Piezoelectric Sound Catalog

Murata Electronics North America

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Datasheet

Piezoelectric Sound
Components
P37E.pdf
Feb.5,2018
EU RoHS Compliant
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P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
Contents
Please check the MURATA website (https://www.murata.com/)
if you cannot find a part number in this catalog.
Product specifications are as of January 2018.
Part Numbering p2
Oscillating System p23
To Raise Sound Pressure Level (S.P.L.) p24
Measuring Method p25
Minimum Quantity p26
Piezoelectric Sounders
SMD Type Product Lineup p4
Pin Type Product Lineup p8
Pin Type Taping Product Lineup p11
Drive Method p13
!Caution · Notice p14
Piezoelectric Buzzers
Product Lineup p16
!Caution · Notice p17
Piezoelectric Diaphragms
Product Lineup p19
Design Procedures · Drive Method p20
!Caution · Notice p21
1
2
3
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
1
2
3
o Part Numbering
1Product ID
SMD Piezoelectric Sounder
PK Piezoelectric Sound Components
Product ID
(Part Number)
6
**
3
1212
2
LCS
4
E
5
40
7
-R1
1
PK
2Product
LCS/MCS SMD Sounder
Code Product
3Dimensions
4Drive
EExternal Drive
Code Drive
5Oscillating Frequency Type
6Individual Specification Code
** Two digits express specific specification
in characteristics.
Code Individual Specification Code
7Packaging
-R1 Plastic Taping
Code Packaging
Expressed resonant frequency by two-digit alphanumerics. The
unit is in 100 hertz (Hz.) 4kHz (4000Hz) is denoted as "40."
6
YH
3
13
2
M
4
E
5
P
7
40
8
**
9
P
:
-A0
1
PK
1Product ID
2Product
6Structure
8Individual Specification Code
Pin Type Piezoelectric Sounders/Piezoelectric Buzzers
PK Piezoelectric Sound Components
Pp
Yp
Cp
p
M
B
Sounder
Buzzer
Flat Type Auto-assemble
Flat Type/Available for Taping
Flat Type/Semi-auto-assemble
Exclude above mentioned
Product
**
Individual Specification Code
Product ID
Code
Code
7Oscillating Frequency Type
Structure
Code
(Part Number)
Pin Type
3Outer Dimensions
4Drive
E
S
DriveCode
5Outer Electrode Style
P
Outer Electrode StyleCode
Post Plated Terminal
Not Post Plated Terminal (Blank)
9Special Quality Guarantee
P
e
Special Quality GuaranteeCode
Bulk
Radial Taping
:Packaging
-B0
-A0
PackagingCode
Two digits express custom specification in
characteristics.
Expressed by two figures in mm.
13
Ex.)
ø12.6mm
External-Drive
Self-Drive
Code Outer Dimensions
Radial taping is not available for all types.
Please contact us.
p signifies specification of the outer electrode.
Expressed resonant frequency by two-digit alphanumerics. The
unit is in 100 hertz (Hz). In case of 4kHz (4000Hz), expressed as
"40."
1818
1212
0909
p18mm
p12mm
p9mm
Code Outer Dimensions
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
2
5
-1R5
3
B
2
N
4
-****
6
L
7
10
1
7
1Product ID
2Metal Plate Material
3Product 7Individual Specification Code
Piezoelectric Diaphragms
7Ceramic Material
B
N
Brass
Nickel Alloy
BPiezoelectric Diaphragms
With lead (available for RoHS)
No lead (omitted)
Product
Product ID
Code Metal Plate Material
Code
6Product Specification
L
e
Code Product Specification
(Part Number)
4Metal Plate Diameter
-****
Metal Plate DiameterCode
A hyphen (-) plus from two to four-digit
alphanumerics express metal plate outer
dimensions. A decimal point is expressed by
the capital letter "R."
5Resonant Frequency Type
A hyphen (-) and three-digit alphanumerics express resonant
frequency. A decimal point is expressed by the capital letter "R." If
there is no decimal point, the decimal point code is omitted.
These digits express a lead length, lead number, and the
presence/absence of a connector. If the product has no individual
specification, the corresponding code is omitted.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
3
Piezoelectric Sound Components
Piezoelectric Sounders SMD Type
RoHS
Taking advantage of extensive acoustic and mechanical
design technology and high performance ceramics,
Murata has developed SMD piezoelectric sounders that
suit the thin, high-density design of electronic
equipment.
Features
1. Small, thin and lightweight
2. High sound pressure level and clear sound
3. Reflowable
4. Tape & Reel supply
3.0 max.
1.1
4.0
12.0
10.0
12.0
(3.0)
(3.0)
(3.3)
(0.4)
Sound Emitting Hole
Marking
(ø0.15) Open Hole
*
Tol.: ±0.2
(in mm)
( ): Ref. only
PKLCS1212E2000-R1
PKLCS1212E20A0-R1
PKLCS1212E2400-R1
PKLCS1212E24A0-R1
:
:
(Note) The location of open hole is not specified.
PKLCS1212E2400-R1
PKLCS1212E24A0-R1
PKLCS1212E2000-R1
PKLCS1212E20A0-R1
3.0 max.
1.2
4.0
(0.7)
(6.4)
10.0
(2.1)
12.0
12.0
(1.9)
(0.9)
Sound Emitting Hole
(in mm)
( ): Ref. only
Tol.: ±0.2
PKLCS1212E4001-R1
PKLCS1212E40A1-R1
(in mm)
9.0
(2.0)
9.0
3.2
1.9 max.
(1.5)
(1.5)
0.6
1.0
Open Hole
Sound Emitting Hole
(Note) The location of open hole is not specified.
(1.5)(0.3)
Tol.: ±0.2
( ): Ref. only
PKMCS0909E4000-R1
PKMCS1818E20A0-R1
Part Number Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Ref. only
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKLCS1212E2000-R1 76dB [±1.5Vo-p,2.0kHz,square wave,10cm] ±12.5 max. (28.0) -20 to +70 -30 to +80
PKLCS1212E2400-R1 80dB [±1.5Vo-p,2.4kHz,square wave,10cm] ±12.5 max. (28.0) -20 to +70 -30 to +80
PKLCS1212E4001-R1 84dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±12.5 max. (19.5) -20 to +70 -30 to +80
PKMCS0909E4000-R1 72dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±12.5 max. (9.0) -40 to +85 -40 to +85
For Consumer
*Operating Voltage Range: Does not contain Direct Current bias.
(14.2)
18.0
16.0
6.46.4
(14.2)
18.0
(10.4)
(0.8)
(1.8)
(6.1)
1.0 1.0
8.0 max.
(2.0)
(1.4)
(3.2)
0.95(0.4)
(1.0)
(0.4)
2.7
(4.5)
(1.4)
Tol.: ±0.2
( ): Ref. only
-Tarminal +Tarminal
+
Polarity:
+terminal (Hot Side of D.C.)
-terminal (0V)
Sound Emitting Hole
(in mm)
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
4
1
Frequency Response
PKLCS1212E2000-R1 / PKLCS1212E20A0-R1
Conditions: 10cm, A-filter
PKLCS1212E2400-R1 / PKLCS1212E24A0-R1
Conditions: 10cm, A-filter
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
10.0
12.4
4.0
(in mm)
Standard Land Pattern Dimensions
PKLCS1212E Series
7.4
10.0
3.4
(in mm)
PKMCS0909E Series
PKMCS1818E Series
(in mm)
18.4
16.0
6.46.4
2.7
1.21.2
Part Number Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Ref. only
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKLCS1212E20A0-R1 76dB [±1.5Vo-p,2.0kHz,square wave,10cm] ±12.5 max. (28.0) -40 to +85 -40 to +85
PKLCS1212E24A0-R1 80dB [±1.5Vo-p,2.4kHz,square wave,10cm] ±12.5 max. (28.0) -40 to +85 -40 to +85
PKLCS1212E40A1-R1 84dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±12.5 max. (19.5) -40 to +85 -40 to +85
PKMCS1818E20A0-R1 100dB [12Vo-p,2.0kHz,square wave,10cm] 18.0Vo-p [with polarity] (37.0) -40 to +105 -40 to +105
For Automotive
*Operating Voltage Range: Does not contain Direct Current bias.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
5
1
Continued on the following page.
Frequency Response
PKLCS1212E4001-R1 / PKLCS1212E40A1-R1
Conditions: 10cm, A-filter
PKMCS0909E4000-R1
Conditions: 10cm, A-filter
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
PKMCS1818E20A0-R1
Conditions: 10cm, A-filter
0
50
60
70
80
90
100
110
120
1
Sound Pressure Level (dB)
Frequency (kHz)
234
Square Wave, 12Vo-p
Dimensions of Carrier Tape Dimensions of Reel
(in mm)
+0.1
24.0±0.2
11.5±0.1 1.75±0.1
ø1.50
2.0±0.1
4.0±0.1
16.0±0.1
12.5±0.1
3.1±0.1
Direction of Feed
-0.0
12.5±0.1
Cover Film
Cover film peel strength force: 0.1–0.7N
Cover film peel speed: 300mm/min.
1
13.0±0.2
33.5 max.
(ø330)
160–200
240–280
2.2±0.2
Components
Trailer
Empty
Leader
(ø80)
400–560
25.5±0.5
Cover Film
Taping Dimension PKLCS1212E Series
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
6
1
Continued from the preceding page.
00*
00*
00*
00*
(in mm)
Direction of Feed
Cover Film
9.5±0.1
Dimensions of Plastic Tape Dimensions of Plastic Reel
Cover film peel strength force 0.1 to 0.7N
Cover film peel speed 300mm/min.
9.5±0.1 12.0±0.1 2.4±0.2
4.0±0.1
2.0±0.1 0.3±0.1
+0.1
–0.0
ø1.5
7.5±0.1
(ø80)
(ø330)
16.0±0.3
1.75±0.1
10°
17.4±1.0
ø13.0±0.5
2.0±0.5
22.5 max.
240 to 280
Empty
400 to 560
Leader
Trailer
160 to 200
Components Cover film
Taping Dimension PKMCS0909E Series
Taping Dimension PKMCS1818E Series
Dimensions of Carrier Tape Dimensions of Reel
(in mm)
13.0±0.2
41.5 max.
(ø330)
160–200
240–280
2.2±0.2
Components
Trailer
Empty
Leader
(ø80)
400–560
33.5±0.5
Cover Film
14.2±0.1
32.0±0.3
18.4±0.1
24±0.1 1.5±0.1
4.0±0.1
2.0±0.1 8.3±0.1
1.75±0.1
1.7±0.1
0.2±0.1
+0.1
ø1.50
-
0.0
Direction of Feed
The cover film peel strength force: 0.1 to 0.7N
The cover film peel speed: 300mm/min.
18.4±0.1
Cover Film
10°
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
7
1
Piezoelectric Sound Components
Piezoelectric Sounders Pin Type
RoHS
Microcomputers are widely used for microwave
ovens, air conditioners, cars, toys, timers, and
alarm equipment. Externally driven piezoelectric
sounders are used in digital watches, electronic
calculators, telephones and other equipment.
They are driven by a signal (ex.: 2048Hz or 4096Hz)
from an LSI and provide melodious sound.
Features
1. Low power consumption
2. Noiseless and highly reliability
Applications
1. Various office equipment such as PPCs printers and
keyboards
2. Home appliances such as microwave oven, rice cookers
etc.
3. Confirmation sound of various audio equipment
0.9
2–ø0.5
2–ø1.0
ø12.6
6.97.5 3.5
5.0
2–ø2.5
(in mm)
Tol.: ±0.5
PKM13EPYH4002-B0
R1.0
2-ø1.2
2-ø3.5
8.6
11.0 3.5
1.2
10.0
ø17.0 Terminal of marking
side should be connected
to hot side of D.C.
(in mm)
Tol.: ±0.5
PKM17EPP-2002-B0
0.8
6.05.0
Part Number
PKM17EPPH4001-B0
PKM17EPPH4002-B0
6.5
3.5
7.0
1.2
ø17.0
10.0
R1.0
2-ø
1.2
2-ø
3.5 (in mm)
Tol.: ±0.5
PKM17EPPH4001-B0
12.6
Hole Pattern
(Reference)
23.0
2-ø1.5
20°
4.7
8.0
ø22.0
4.0
5.0
8.3
11.0
4.8
10.5
1.6
Part Number
PKM22EPH2001
PKM22EPH2002
PKM22EPH2003
4.0
8.0
12.0
(in mm)
Tol.: ±0.5
PKM22EPH2001
10.8
1.2
ø22.0
10.0
R1.0
10.0
2–ø1.2
2–ø3.5 (in mm)
Tol.: ±0.5
Part Number
PKM22EPPH2001-B0
PKM22EPPH2002-B0
6.5
3.5
0.8
PKM22EPPH2001-B0
7.0
1.2
ø22.0
10.0
R1.0
10.0
2–ø1.2
2–ø3.5 (in mm)
Tol.: ±0.5
Part Number
PKM22EPPH4001-B0
PKM22EPPH4002-B0
6.5
3.5
0.8
PKM22EPPH4001-B0
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
8
1
3–ø1.5
10.0
18°
18°
120°
120°
1.2
8.26.5
3.5
R1.0
ø22.0
5.0
3–ø1.7
2–ø3.5
ø1.2
R8.5
5.0
(in mm)
Tol.: ±0.5
0.8
PKM22EPPH4005-B0
10.8
1.2
10.0
ø22.0
10.0
0.8
R1.0
2-ø1.2
2-ø3.5 (in mm)
Tol.: ±0.5
Part Number
PKM22EPPH4007-B0
PKM22EPPH4012-B0
6.5
3.5
PKM22EPPH4007-B0
Frequency Response
PKM13EPYH4002-B0
Conditions: 10cm, A-filter
PKM17EPP-2002-B0
Conditions: 10cm, A-filter
Part Number Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKM13EPYH4002-B0
78dB [±1.5Vo-p,4.0kHz, square wave,10cm] ±15.0 max. 5.5 ±30%[1kHz] -40 to +85 -40 to +85
PKM17EPP-2002-B0
79dB [3.0Vo-p,2.0kHz, square wave,10cm] 25.0 max. [with polarity] 34.0 ±30%[120Hz] -20 to +70 -30 to +80
PKM17EPPH4001-B0
79dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±12.5 max. 7.0 ±30%[1kHz] -20 to +70 -30 to +80
PKM22EPH2001
85dB [±1.5Vo-p,2.0kHz,square wave,10cm] ±12.5 max. 17.0 ±30%[120Hz] -20 to +70 -30 to +80
PKM22EPPH2001-B0
79dB [±1.5Vo-p,2.0kHz,square wave,10cm] ±15.0 max. 19.0 ±30%[120Hz] -20 to +70 -30 to +80
PKM22EPPH4001-B0
87dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±15.0 max. 12.0 ±30%[1kHz] -20 to +70 -30 to +80
PKM22EPPH4005-B0
86dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±15.0 max. 12.0 ±30%[1kHz] -20 to +70 -30 to +80
PKM22EPPH4007-B0
92dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±15.0 max. 12.0 ±30%[1kHz] -20 to +70 -30 to +80
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
*Operating Voltage Range: Does not contain Direct Current bias.
PKM17EPPH4001-B0
Conditions: 10cm, A-filter
PKM22EPH2001
Conditions: 10cm, A-filter
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
9
1
Continued on the following page.
Frequency Response
PKM22EPPH2001-B0
Conditions: 10cm, A-filter
PKM22EPPH4005-B0
Conditions: 10cm, A-filter
PKM22EPPH4001-B0
Conditions: 10cm, A-filter
PKM22EPPH4007-B0
Conditions: 10cm, A-filter
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
10
1
Continued from the preceding page.
Piezoelectric Sound Components
Piezoelectric Sounders Pin Type Taping
RoHS
Taking advantage of extensive automatic insertion
design technology and materials experience, Murata
has developed standard taping type piezoelectric
sounders.
This Murata technology supports labor and cost saving
measures.
Features
1. Lead dimension: Improved mounting reliability
(cut & clinch) due to round terminal
2. High, stable mountability
3. Ammo packaging
0.9
2–ø0.5
2–ø1.0
ø12.6
6.97.5 22.0
5.0
2–ø2.5 (in mm)
Tol.: ±0.5
Part Number Sound Pressure Level
(typ.)
Operating
Voltage Range*
(Vo-p)
Capacitance
(nF)
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKM13EPYH4000-A0 78dB [±1.5Vo-p,4.0kHz,square wave,10cm] ±15.0max. 5.5 ±30%[1kHz] -40 to +85 -40 to +85
Frequency Response
PKM13EPYH4000-A0
Conditions: 10cm, A-filter
Square wave, ±1.5Vo-p
50
55
60
65
70
75
80
85
90
95
100
012345678910
Sound Pressure Level (dB)
Frequency (kHz)
*Operating Voltage Range: Does not contain Direct Current bias.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
11
1
Item
Width of diameter
Height of component
Dimensions of terminal
Lead length under the
hold-down tape
Pitch of component
Pitch of sprocket
Length from hole center to lead
Length from hole center to
component center
Lead spacing
Slant forward or backward
Width of carrier tape
Width of hold-down tape
Position of sprocket hole
Gap of hold-down tape and
carrier tape
Distance between the center of
sprocket hole and lead stopper
Total height of component
Diameter of sprocket hole
Total thickness of tape
Body tilt
D
A
d1
L1
P
P0
P1
P2
F
dh
W
W0
W1
W2
H0
H1
D0
t
dS
(in mm)
Code
±0.5
±0.5
±0.1
±0.5
±0.2
±0.7
±0.7
±0.5
±1.0
±0.5
±0.5
±0.5
±0.2
±0.2
±1.0
Tol.
Tolerance for Pitches 10xP0=127±2mm
360°: 1mm max.
Hold-down tape does not exceed the carrier tape.
Notes
ø12.6
6.9
ø0.5
8.0 min.
25.4
12.7
3.85
6.35
5.0
0
18.0
12.5 min.
9.0
2.0 max.
18.0
26.0 max.
ø4.0
0.6
0
Nominal Value
H1
H0
W1
PP2
dh dh
t
P0
D0
P1F
d1
dS
A
L1
D
W0
W
W2
Taping Dimension
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
12
1
Drive Method
Fig. 1 shows examples of the circuit to which the external
drive method is applied.
( i ) Represents a circuit driven by output signals of the
unstable multivibrator.
( ii ) Represents a circuit using 2 NAND gates, which is
oscillated or stopped by ON/OFF operations of the input
signals.
( iii ) Represents a circuit driven by output signals of CMOS
LSI.
Fig. 1 Drive Circuit
1kΩ
510Ω 20kΩ
1kΩ
0.01μF
20kΩ 510Ω
+V
0.01μF
( i )
120kΩ
0.001μF1MΩ
1kΩ
+V
1kΩ
Input
Signal
( ii )
Drive
Circuit
LCD
Resonator
1kΩ Buzzer
CMOS LSI
+V
( iii )
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
13
1
!Caution · Notice
!Caution (Rating)
Do not use the product beyond the rated temperature
range and the rated voltage range. If using it beyond this
range, characteristics might degrade.
Notice (Storage and Operating Condition)
1. Product Storage Condition
Please store the products in a room where the
temperature/humidity is stable and avoid places where
there are large temperature changes. Please store the
products under the following conditions.
Temperature: -10 to +40°C
Humidity: 15 to 85%R.H.
2. Expiration Date on Storage
Expiration date (shelf life) of the products is six months
after delivery under the condition of a sealed and
unopened package. Please use the products within six
months after delivery. If you store the products for a long
time (more than six months), use carefully because the
products may be degraded in solderability due to storage
under poor conditions.
Please confirm solderability and characteristics for the
products regularly.
3. Notice on Product Storage
(1) Please do not store the products in a chemical
atmosphere (Acids, Alkali, Bases, Organic gas, Sulfides
and so on), because the characteristics may be reduced
in quality, may be degraded in solderability due to
storage in a chemical atmosphere.
Notice (Soldering and Mounting)
1. Mounting
When mounting a pin terminal type of product to the
printed circuit board, please insert the pin terminal along
the hole of the board. If the product is pressed so that the
terminal is not in the hole, the pin terminal would be
pushed into the inside of the product and the sounds
might become unstable.
2. Double-sided through-hole Board
Please avoid using a double-sided through-hole board. If
the melted solder touched the base of a pin terminal, a
part of the plastic case would melt and the sounds might
become unstable.
3. Soldering Conditions
(1) Flow soldering conditions for pin terminal type
· Temperature: within 260°C±5°C
· Time: within 10±1 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body.
(2) Please do not store the products directly on the floor
without anything under them to avoid damp places
and/or dusty places.
(3) Please do not store the product in places such as in a
damp heated place or any place exposed to direct
sunlight or excessive vibration.
(4) Please use the products immediately after the
package is opened, because the characteristics may be
reduced in quality, and/or be degraded in solderability
due to storage under poor conditions.
(5) Please be sure to consult with our sales representative
or engineer whenever the products are to be used in
conditions not listed above.
4. Operating Environment
This product is designed for application in an ordinary
environment (normal room temperature, humidity and
atmospheric pressure).
Do not use the products in a chemical atmosphere such
as chlorine gas, acid or sulfide gas.
Characteristics might degrade by a chemical reaction
with the material used in products.
(2) Soldering condition by soldering iron for pin terminal
type
· Temperature: within 350±5°C
· Time: within 3.0±0.5 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body
(3) Reflow soldering condition for surface mounting type
· Temperature profile: Fig. 1
· Number of times: Within 2 maximum
Fig. 1
260
Peak
(260°C max.)
Heating
(230°C)
Gradual
Cooling
Pre-heating
(150-180°C)
30 sec.
min. 60 to 120 sec. 40 sec.
max. 120 sec.
min.
Temperature (°C)
230
100
Continued on the following page.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
14
1
!Caution · Notice
4. Washing
Please avoid washing, since this product is not a sealed
structure.
5. After Mounting the Product
(1) If the product is floating from the printed circuit board,
please do not push it. When pressing, the pin terminal is
pushed inside the product and the sounds might
become unstable.
(2) Please do not apply force (shock) to the product. If
force is applied, the case might come off.
(3) If the case comes off, please do not reassemble. Even
if it seems to have returned to the original, the sounds
might become unstable.
(4) Please do not blow air onto the product directly.
Blown air applies force to the piezoelectric diaphragm
through the sound emission hole; cracks could occur
and then the sounds could become unstable. In
addition, there is a possibility that the case could come
off.
Notice (Handling)
1. Piezoelectric ceramic is used in this product. Please use
care in handling, because ceramic is broken when
excessive force is applied.
2. Please do not apply force to the piezoelectric diaphragm
from the sound emission hole. If applying force, cracks
occur and the sounds might become unstable.
3. Please do not drop the product or apply shock or
temperature change to it. If so, the LSI might be
destroyed by the charge (surge voltage) generated. Fig. 2
shows an example driving circuit using zener diode.
Notice (Driving)
1. Ag migration might occur if DC voltage is applied to the
product under a high humidity environment. Please avoid
using it under high humidity and design the circuit not to
apply DC voltage.
2. When driving the product by IC, please insert the
resistance of 1 to 2kΩ in series. The purpose is to protect
the IC and to obtain stable sound. (Please see Fig. 2a).
Inserting a diode in parallel to the product has the same
effect. (Please see Fig. 3b)
6. Flux or Coating Agent, etc., Various Solvents
It is possible for a liquid solvent to penetrate inside the
product, since this product is not a sealed structure. If a
liquid penetrated inside and attached to the piezoelectric
diaphragm, its vibration could be inhibited. If attaching to
an electrical junction, the electric connection might fail.
To prevent sound instability, please do not allow liquid to
penetrate inside the product.
Fig. 2 Protect Circuit
Fig. 3a Fig. 3b
R
IC IC
Buzzer
LSI
Continued from the preceding page.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
15
1
Piezoelectric Sound Components
Piezoelectric Buzzers
RoHS
This is a unified piezoelectric sounder that has a
piezoelectric diaphragm of 3 terminals connected to a
self-drive circuit, and it easily generates sound with
only a DC power supply (DC3.0-15V). Using a suitably
designed resonant system, this type can be used where
large sound volumes are needed.
Applications
1. Gas alarms, burglar alarms
2. Air conditioners, microwave ovens and various types of
microcomputer controlled home electronic appliances
3. Toys, games, and other simple electronic devices
such as teaching aids
0.7±0.3
9.7±0.3
4.5±1
24.3±0.3
15.0
R1.0
0.6±0.1
(in mm)
Tol.: ±0.5
PKB24SPCH3601-B0
Part Number
Sound
Pressure Level
(min.)
Oscillating
Frequency
(kHz)
Current
Consumption
(mA)
Operating
Voltage Range
(Vdc)
Operating
Temp. Range
(°C)
Storage
Temp. Range
(°C)
PKB24SPCH3601-B0 90dB
[12Vdc,10cm]
3.6 ±0.5kHz
[12Vdc]
16 max.
[12Vdc] 3.0 to 15.0 -20 to +70 -30 to +80
Input Voltage (Vdc)
51015
Sound Pressure Level
Consumption Current
Sound Pressure Level (dB)
110
100
90
80
20
15
25
10
5
0
Consumption Current (mA)
Voltage-Sound Pressure Level/Voltage-Consumption Current
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
16
2
!Caution · Notice
!Caution (Rating)
Do not use the product beyond the rated temperature
range and the rated voltage range. If using it beyond this
range, characteristics might degrade.
Notice (Storage and Operating Condition)
1. Product Storage Condition
Please store the products in a room where the
temperature/humidity is stable and avoid places where
there are large temperature changes. Please store the
products under the following conditions.
Temperature: -10 to +40°C
Humidity: 15 to 85%R.H.
2. Expiration Date on Storage
Expiration date (shelf life) of the products is six months
after delivery under the condition of a sealed and
unopened package. Please use the products within six
months after delivery. If you store the products for a long
time (more than six months), use carefully because the
products may be degraded in solderability due to storage
under poor conditions.
Please confirm solderability and characteristics for the
products regularly.
3. Notice on Product Storage
(1) Please do not store the products in a chemical
atmosphere (Acids, Alkali, Bases, Organic gas, Sulfides
and so on), because the characteristics may be reduced
in quality, may be degraded in solderability due to
storage in a chemical atmosphere.
Notice (Soldering and Mounting)
1. Mounting
When mounting a pin terminal type of product to the
printed circuit board, please insert the pin terminal along
the hole of the board. If the product is pressed so that the
terminal is not in the hole, the pin terminal would be
pushed into the inside of the product and the sounds
might become unstable.
2. Double-sided through-hole Board
Please avoid using a double-sided through-hole board. If
the melted solder touched the base of a pin terminal, a
part of the plastic case would melt and the sounds might
become unstable.
3. Soldering Conditions
(1) Flow soldering conditions for pin terminal type
· Temperature: within +260°C±5°C
· Time: within 10±1 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body.
(2) Soldering condition by soldering iron for pin terminal
type
· Temperature: within 350±5°C
(2) Please do not store the products directly on the floor
without anything under them to avoid damp places
and/or dusty places.
(3) Please do not store the product in places such as in a
damp heated place or any place exposed to direct
sunlight or excessive vibration.
(4) Please use the products immediately after the
package is opened, because the characteristics may be
reduced in quality, and/or be degraded in solderability
due to storage under poor conditions.
(5) Please be sure to consult with our sales representative
or engineer whenever the products are to be used in
conditions not listed above.
4. Operating Environment
This product is designed for application in an ordinary
environment (normal room temperature, humidity and
atmospheric pressure).
Do not use the products in a chemical atmosphere such
as chlorine gas, acid or sulfide gas.
Characteristics might degrade by a chemical reaction
with the material used in products.
· Time: within 3.0±0.5 sec.
· Soldering part is the lead terminals excluding 1.5mm
from product body.
4. Washing
Please avoid washing, since this product is not a sealed
structure.
5. After Mounting the Product
(1) If the product is floating from the printed circuit board,
please do not push it. When pressing, the pin terminal is
pushed inside the product and the sounds might
become unstable.
(2) Please do not apply force (shock) to the product. If
force is applied, the case might come off.
(3) If the case comes off, please do not reassemble. Even
if it seems to have returned to the original, the sounds
might become unstable.
(4) Please do not blow air onto the product directly.
Blown air applies force to the piezoelectric diaphragm
through the sound emission hole; cracks could occur
and then the sounds could become unstable.
Continued on the following page.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
17
2
!Caution · Notice
6. Flux or Coating Agent, etc., Various Solvents
It is possible for a liquid solvent to penetrate inside the
product, since this product is not a sealed structure. If a
liquid penetrated inside and attached to the piezoelectric
diaphragm, its vibration could be inhibited. If attaching to
an electrical junction, the electric connection might fail.
To prevent sound instability, please do not allow liquid to
penetrate inside the product.
Notice (Handling)
1. Piezoelectric ceramic is used in this product. Please use
care in handling, because ceramic is broken when
excessive force is applied.
2. Please do not apply force to the piezoelectric diaphragm
from the sound emission hole. If applying force, cracks
occur and the sounds might become unstable.
3. Please do not drop the product or apply shock or
temperature change to it. If so, the LSI might be
destroyed by the charge (surge voltage) generated.
Notice (Driving)
1. When using a piezoelectric buzzer, there is no need to
prepare the oscillation circuit; it has an oscillation circuit.
2. Please set the sounding time more than 200 msec., when
driving the piezoelectric sounder of self-drive or the
piezoelectric buzzer as an intermittent sound.
3. Please don’t block the sound emission hole with tape to
control the sound volume. The oscillation circuit condition
is set so as to obtain a stable sounding (oscillating) state
under the condition that the front of sound emission hole
is in an open state. If the sound emission hole is blocked
with tape, then the oscillation condition changes and the
sounds might become unstable.
4. Please don’t put a resistor between the oscillation circuit
and power supply to control the sound volume of the
piezoelectric sounder or the piezoelectric buzzer. Doing so
could cause an unstable sounding state like an abnormal
oscillation or the oscillation stopping because of the
change in oscillation conditions. Please insert a capacitor
(about 1μF) in parallel with the piezoelectric buzzer, if you
need to control the sound volume. (Please see Fig. 2)
5. Please keep a distance of more than 15mm between the
surface of sound emission hole and the surface of
housing, when mounting the piezoelectric sounder of
self-drive or the piezoelectric buzzer into your set. A
shorter distance could cause an unstable sounding state
like an abnormal oscillation or the oscillation stopping;
because the oscillation conditions change, the acoustics
are influenced by reflection.
Fig. 2
Fig. 1 Protect Circuit
Buzzer
LSI
+Vdc
Buzzer Capacitor
(1μF)
Continued from the preceding page.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
18
2
Piezoelectric Sound Components
Piezoelectric Diaphragms
RoHS
Features
1. Clear sound
2. Ultra thin and lightweight
3. No contacts; therefore, noiseless and highly reliable
4. Low power consumption for voltage type
Applications
Clocks/Calculators/Digital camera/Various alarms
(Burglar alarms, etc.)
T
t
Red
Black
øD øa øb
Part Number
Resonant
Frequency
(kHz)
Resonant
Impedance
(Ω)
Capacitance
(nF)
Plate Size
øD
(mm)
Element Size
øa
(mm)
Electrode Size
øb
(mm)
Thickness
T
(mm)
Plate Thickness
t
(mm)
Plate Material
7BB-12-9 9.0 ±1.0kHz 1000 max. 8.0 ±30%
[1kHz] 12.0 9.0 8.0 0.22 0.10 Brass
7BB-15-6 6.0 ±1.0kHz 800 max. 10.0 ±30%
[1kHz] 15.0 10.0 9.0 0.22 0.10 Brass
7BB-20-3 3.6 ±0.6kHz 500 max. 20.0 ±30%
[1kHz] 20.0 14.0 12.8 0.22 0.10 Brass
7BB-20-6 6.3 ±0.6kHz 350 max. 10.0 ±30%
[1kHz] 20.0 14.0 12.8 0.42 0.20 Brass
7BB-20-6L0 6.3 ±0.6kHz 1000 max. 10.0 ±30%
[1kHz] 20.0 14.0 12.8 0.42 0.20
Brass
(with Lead Wire:
AWG32 Length 50mm)
7BB-27-4 4.6 ±0.5kHz 200 max. 20.0 ±30%
[1kHz] 27.0 19.7 18.2 0.54 0.30 Brass
7BB-27-4L0 4.6 ±0.5kHz 300 max. 20.0 ±30%
[1kHz] 27.0 19.7 18.2 0.54 0.30
Brass
(with Lead Wire:
AWG32 Length 50mm)
7BB-35-3 2.8 ±0.5kHz 200 max. 30.0 ±30%
[1kHz] 35.0 25.0 23.0 0.53 0.30 Brass
7BB-35-3L0 2.8 ±0.5kHz 200 max. 30.0 ±30%
[1kHz] 35.0 25.0 23.0 0.53 0.30
Brass
(with Lead Wire:
AWG32 Length 50mm)
7BB-41-2 2.2 ±0.3kHz 250 max. 30.0 ±30%
[1kHz] 41.0 25.0 23.0 0.63 0.40 Brass
7BB-41-2L0 2.2 ±0.3kHz 300 max. 30.0 ±30%
[1kHz] 41.0 25.0 23.0 0.63 0.40
Brass
(with Lead Wire:
AWG32 Length 50mm)
7NB-31R2-1 1.3 ±0.5kHz 300 max. 40.0 ±30%
[120Hz] 31.2 19.7 18.2 0.22 0.10 Nickel Alloy
External Drive Type
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
19
3
Design Procedure · Drive Method
Design Procedure
In general, man’s audible frequency range is about 20Hz to
20kHz.
Frequency ranges of 2kHz to 4kHz are most easily heard.
For this reason, most piezoelectric sound components are
used in this frequency range and the resonant frequency (fo)
is generally selected in the same range.
In general, the piezoelectric diaphragm is installed in a
cavity to produce high sound pressure (Fig 1).
The resonant frequency (fcav) of the cavity in Fig. 1 is
obtained from Formula (1) (Helmholtz’s Formula).
Since the piezoelectric diaphragm and cavity have proper
resonant frequencies, (fo) and (fcav) respectively, sound
pressure in specific frequencies can be increased and a
specific bandwidth can be provided by controlling both
positions.
Drive Method
This method produces sound by driving the piezoelectric
diaphragm with electric signals supplied from an external
oscillating circuit such as a multivibrator.
Using this method, the piezoelectric buzzer can work as a
speaker. In this method, a mechanical oscillation Qm of the
piezoelectric diaphragm is damped properly to provide a
wider frequency band of the sound pressure. This is applied
to the switching sounds of home electric appliances, key-in
sounds of OA equipment, because it can provide multiple
sounds, not just a single sound. Fig. 3 shows examples of the
circuit to which the external drive method is applied:
( i ) represents a circuit driven by output signals of the
unstable multivibrator; ( ii ) represents a circuit using 2
NAND gates, which is oscillated or stopped by ON/OFF
operations of the input signal; ( iii ) represents a circuit
driven by output signals of CMOS LSI.
Fig. 3 Examples of the External Drive Circuit
Fig. 2 Drive Procedure
Fig. 1 Sectional View of a Cavity
1kΩ
510Ω 20kΩ
1kΩ
0.01μF
20kΩ 510Ω
+V
0.01μF
( i )
120kΩ
0.001μF1MΩ
1kΩ
+V
1kΩ
Input
Signal
( ii )
Drive
Circuit
LCD
Resonator
1kΩ Buzzer
CMOS LSI
+V
( iii )
fcav : Resonant freq. of a cavity (Hz)
c : Speed of sound (cm/sec)
Ref) approx. 347 x 102cm/sec at 25°C
a : Radius of sound emitting hole (cm)
d : Diameter of a supporting rim (cm)
h : Depth of a cavity (cm)
R: Wall thickness of a cavity (cm)
V
C
2=
a 2
V (R+1.3a)
C
2
4a 2
d 2h (R+1.3a)
fcav = ····················· (1)
External
Drive Circuit
d
2a
hR
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
20
3
!Caution · Notice
!Caution (Rating)
Do not use the product beyond the rated temperature
range. If using it beyond this range, characteristics might
degrade.
The rated voltage range is not specified; depending on the
driving condition or the mounting method, the rated voltage
range is different. In your evaluation, please use actual
operating voltage.
Notice (Storage and Operating Condition)
1. Product Storage Condition
Please store the products in a room where the
temperature/humidity is stable and avoid places where
there are large temperature changes. Please store the
products under the following conditions.
Temperature: -10 to +40°C
Humidity: 15 to 85%R.H.
2. Expiration Date on Storage
Expiration date (shelf life) of the products is six months
after delivery under the condition of a sealed and
unopened package. Please use the products within six
months after delivery. If you store the products for a long
time (more than six months), use carefully because the
products may be degraded in solderability due to storage
under poor conditions.
Please confirm solderability and characteristics for the
products regularly.
3. Notice on Product Storage
(1) Please do not store the products in a chemical
atmosphere (Acids, Alkali, Bases, Organic gas, Sulfides
and so on), because the characteristics may be reduced
in quality, may be degraded in solderability due to
storage in a chemical atmosphere.
Notice (Soldering and Mounting)
1. Mounting
When mounting the product on your set, pressing force
should be applied to only the supporting part. When force
is applied to the non-supporting part, cracks might occur,
causing unstable sounds.
2. Soldering
(1) Please consult with a Murata representative if you
need to solder the lead wires to the product. We can
deliver the products with soldered lead wires.
When soldering, it is recommended to solder by heating
the product (from 60 to 80°C, more than 10 sec).
Including the presence or absence of heating, please
use after a thorough evaluation about soldering.
Soldering condition is as follows.
(2) Please do not store the products directly on the floor
without anything under them to avoid damp places
and/or dusty places.
(3) Please do not store the product in places such as in a
damp heated place or any place exposed to direct
sunlight or excessive vibration.
(4) Please use the products immediately after the
package is opened, because the characteristics may be
reduced in quality, and/or be degraded in solderability
due to storage under poor conditions.
(5) Please be sure to consult with our sales representative
or engineer whenever the products are to be used in
conditions not listed above.
4. Operating Environment
This product is designed for application in an ordinary
environment (normal room temperature, humidity and
atmospheric pressure).
Do not use the products in a chemical atmosphere such
as chlorine gas, acid or sulfide gas.
Characteristics might degrade by a chemical reaction
with the material used in products.
· Metal Plate
Temperature of soldering iron: from 410 to 450°C
Soldering Time: within 3 sec.
· Ag electrode
Temperature of soldering iron: from 320 to 350°C
Soldering Time: within 0.5 sec.
· Solder: Sn-Ag-Cu (Flux-cored solder)
(2) Soldering condition of the lead wire to printed circuit
board by using soldering iron.
· Temperature: 350±5°C
· Time: within 3.0±0.5 sec.
Continued on the following page.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
21
3
!Caution · Notice
Notice (Handling)
1. Piezoelectric ceramic is used in this product. Please use
care in handling, because the ceramic is broken when
excessive force is applied.
2. To avoid rusting, please do not touch the products with
bare hands.
3. Please do not pull the lead wire of the product. Pulling
may cause the lead wire to disconnect or to peel off the
solder point.
4. When attaching a connector to the lead wires, please do
not apply force to the soldering part. After attaching a
connector, we recommend checking the connecting
status.
5. Please do not bend the product or apply any force to it.
Also, please do not press it with sharp objects. Applying
force could cause cracks to occur in the piezoelectric
ceramic, resulting in unstable sounds.
6. Please do not drop the product or apply shock or
temperature change to it. If so, the LSI might be
destroyed by the charge (surge voltage) generated. Fig.1
shows an example driving circuit using zener diode.
Notice (Driving)
1. Ag migration might occur if DC voltage is applied to the
product under a high humidity environment. Please avoid
using it under high humidity and design the circuit not to
apply DC voltage.
2. When driving the product by IC, please insert the
resistance of 1 to 2kΩ in series. The purpose is to protect
the IC and to obtain stable sound. (Please see Fig. 2a).
Inserting a diode in parallel to the product has the same
effect. (Please see Fig. 2b).
Fig. 1 Protect Circuit
Fig. 2a Fig. 2b
R
IC IC
Buzzer
LSI
Continued from the preceding page.
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
22
3
Oscillating System
Basically, the sound source of a piezoelectric sound
component is a piezoelectric diaphragm. A piezoelectric
diaphragm consists of a piezoelectric ceramic plate that has
electrodes on both sides and a metal plate (brass or
stainless steel, etc.).
A piezoelectric ceramic plate is attached to a metal plate
with adhesives. Fig. 2 shows the oscillating system of a
piezoelectric diaphragm.
Applying DC voltage between electrodes of a piezoelectric
diaphragm causes mechanical distortion due to the
piezoelectric effect. For a misshapen piezoelectric element,
the distortion of the piezoelectric element expands in a
radial direction, and the piezoelectric diaphragm bends
toward the direction shown in Fig. 2 (a). The metal plate
bonded to the piezoelectric element does not expand.
Conversely, when the piezoelectric element shrinks, the
piezoelectric diaphragm bends in the direction shown in
Fig. 2 (b). Thus, when AC voltage is applied across
electrodes, the bending shown in Fig. 2 (a) and Fig. 2 (b) is
repeated as shown in Fig. 2 (c), producing sound waves in
the air.
Fig. 1 Structure of Piezoelectric Diaphragm
Fig. 2 Oscillation System
Electrode
Electrode
Piezoelectric
Ceramics
Piezoelectric
Ceramics
Piezoelectric
Element
Piezoelectric
Diaphragm
Metal
Plate
(a) Extended State
(b) Shrinked State
(c) AC Voltage Applied
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
23
To Raise Sound Pressure Level (S.P.L.)
It is probable that the S.P.L. of Piezoelectric sound
components is higher when the input voltage is higher
because Piezoelectric sound components are driven by
voltage. The SPL when the input voltage being converted
from V1 to V2 can be calculated from the following formula.
SPL at V2 = SPL at V1 + 20log (V2/V1)
V1: previous input voltage
V2: increased input voltage
Therefore, S.P.L. is theoretically getting 6dB higher as the
input voltage is twice as high.
Fig. 1 represents S.P.L. - frequency characteristics for
PKLCS1212E4001-R1 in which the input voltage is varied.
We can see that S.P.L. is approximately getting 6dB higher
as the input voltage is twice as high.
In summary, the following are typical examples of raising
S.P.L.
(1) ( i ), ( ii ), ( iii ) in Fig. 3 (Examples of the External Drive
Circuit) (page 19), input DC voltage for Piezoelectric
sound components should be getting higher.
Variable range of input voltage should be less than
maximum input voltage.
(2) In a case that is driven by IC directly like as Fig. 2, input
voltage of Piezoelectric sound components should be
twice as high because of the BTL (Bridge Tied Load) drive
circuit, which includes an inverter.
Fig. 1 Frequency Characteristics of Sound Pressure Level
Fig. 2 Example of BTL Drive Circuit
by 1-port Output IC for Buzzer
Frequency Characteristics of Sound Pressure Level
PKLCS1212E4001-R1
100
90
80
70
60
50 0123456
Frequency (kHz)
Sound Pressure Level (dB)
Distance: 10cm
Wave form: Square Wave
±6.0Vp-p
±3.0Vp-p
±1.5Vp-p
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
24
Measuring Method
Measuring Procedure
Measurement of Resonant Frequency and Resonant
Impedance
When the piezoelectric diaphragm oscillates freely in air,
the node does not move as shown in Fig. 1. With this point
held with a measuring terminal, the resonant frequency (f0)
and resonant impedance (R0) are measured in the
constant-current circuit as shown in Fig. 2.
Measuring Procedure
1) Connect the switch to side "a" and adjust frequency of
the oscillator to read the frequency and the voltage when
the voltmeter indicates a minimum value.
2) Next connect the switch to side "b" and vary the variable
resistor to have the same voltage as in 1). Then, read the
value of the resistor.
3) The resonant frequency (f0) can be obtained from 1) and
the resonant impedance (R0) from 2).
Note: Actual measurement is performed using a measuring
unit in accordance with the above principles.
Measurement of Sound Pressure Level (S.P.L.)
The sound pressure level is measured with a sound pressure
level meter as shown in Fig. 3.
Note: The relation between sound pressure level and
distance between sound pressure level and voltage can
be expressed with Formula (2). The value of the sound
pressure level under different operating conditions can be
easily calculated using values specified in the catalog.
S.P.L.(dB) [under actual operating conditions]
= S.P.L.(dB) [value specified in catalog]
+20 log (B/A) ··········································(2)
In case of relation with distance:
A = Actual distance
B = Distance specified in catalog
In case of relation with voltage:
A = Voltage specified in catalog
B = Actual operating voltage
Fig. 1 Measurement of Piezoelectric Diaphragm
Fig. 2 Measurement Set-Up of Resonant Freq.
and Resonant Impedance
Fig. 3 Measurement Set-Up of S.P.L.
Measuring
Terminal
Node
Supporting Method
R1 (10kΩ Around)
Piezoelectric
Diaphragm
Voltmeter
Variable
Resistor
Switch
ba
Frequency
Counter
Oscillator
(1Vrms max.)
Piezoelectric Sounder
(Self-Drive)
Frequency
Counter
Oscillation
Circuit
Sound Pressure
Level Meter
Measuring
Distance
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
25
Minimum Quantity
Product Names Part Number Minimum Quantity (pcs.)
Bulk (Box) Ammo PackØ330mm Reel
o Piezoelectric Diaphragms 7BB-12-9
7BB-15-6
7BB-20-3
7BB-20-6
7BB-20-6L0
7BB-27-4
7BB-27-4L0
7BB-35-3
7BB-35-3L0
7BB-41-2
7BB-41-2L0
7NB-31R2-1
5120
8000
3000
1800
600
1500
600
800
400
400
250
3000
o Piezoelectric Sounders PKLCS1212E2000-R1
PKLCS1212E20A0-R1
PKLCS1212E2400-R1
PKLCS1212E24A0-R1
PKLCS1212E4001-R1
PKLCS1212E40A1-R1
PKMCS0909E4000-R1
PKMCS1818E20A0-R1
PKM13EPYH4000-A0
PKM13EPYH4002-B0
PKM17EPP-2002-B0
PKM17EPPH4001-B0
PKM17EPPH4002-B0
PKM22EPH2001
PKM22EPH2002
PKM22EPH2003
PKM22EPPH2001-B0
PKM22EPPH2002-B0
PKM22EPPH4001-B0
PKM22EPPH4002-B0
PKM22EPPH4005-B0
PKM22EPPH4007-B0
PKM22EPPH4012-B0
500
1980
1000
1200
1200
360
270
270
750
750
900
900
750
750
750
1000
1000
1000
1000
1000
1000
2000
250
o Piezoelectric Buzzers PKB24SPCH3601-B0 650
P37E.pdf
Feb.5,2018
!Note • Please read rating and !CAUTION (for storage, operating, rating, soldering, mounting and handling) in this catalog to prevent smoking and/or burning, etc.
• This catalog has only typical specifications. Therefore, please approve our product specifications or transact the approval sheet for product specifications before ordering.
26
Murata Manufacturing Co., Ltd.
www.murata.com
Note
1 Export Control
For customers outside Japan:
No Murata products should be used or
sold, through any channels, for use in the
design, development, production, utilization,
maintenance or operation of, or otherwise
contribution to (1) any weapons (Weapons of
Mass Destruction [nuclear, chemical or biological
weapons or missiles] or conventional weapons)
or (2) goods or systems specially designed or
intended for military end-use or utilization by
military end-users.
For customers in Japan:
For products which are controlled items subject
to the “Foreign Exchange and Foreign Trade Law
of Japan, the export license specifi ed by the law
is required for export.
2 Please contact our sales representatives or
product engineers before using the products in
this catalog for the applications listed below,
which require especially high reliability for the
prevention of defects which might directly
damage a third party’s life, body or property, or
when one of our products is intended for use
in applications other than those specified in
this catalog.
1 Aircraft equipment
2 Aerospace equipment
3 Undersea equipment
4 Power plant equipment
5 Medical equipment
6 Transportation equipment (vehicles, trains,
ships, etc.)
7 Traffi c signal equipment
8 Disaster prevention / crime prevention
equipment
9 Data-processing equipment
10 Application of similar complexity and/or
reliability requirements to the applications
listed above
3 Product specifi cations in this catalog are as of
January 2018. They are subject to change or
our products in it may be discontinued without
advance notice. Please check with our sales
representatives or product engineers before
ordering. If there are any questions, please contact
our sales representatives or product engineers.
4 Please read rating and CAUTION (for storage,
operating, rating, soldering, mounting and
handling) in this catalog to prevent smoking
and/or burning, etc.
5 This catalog has only typical specifi cations.
Therefore, please approve our product
specifi cations or transact the approval sheet
for product specifi cations before ordering.
6 Please note that unless otherwise specifi ed, we
shall assume no responsibility whatsoever for any
confl ict or dispute that may occur in connection
with the eff ect of our and/or a third party’s
intellectual property rights and other related
rights in consideration of your use of our products
and/or information described or contained in our
catalogs. In this connection, no representation
shall be made to the eff ect that any third parties
are authorized to use the rights mentioned above
under licenses without our consent.
7 No ozone depleting substances (ODS) under the
Montreal Protocol are used in our manufacturing
process.
Global Locations
For details please visit www.murata.com
Cat. No. P37E-28
P37E.pdf
Feb.5,2018

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