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Shown on this slide is a real world design/application example showing both the 9X442SL and 9X440SL being used in a 4G LTE cell tower application. The USB 2.0 hubs are used for debug, software upload, KVA, and error logging as part of tower transmitter equipment maintenance. The Freescale MPC family, while popular for LTE applications such as this, have no USB 2.0 ports. Pericom has a joint reference design with Freescale for a superset of this type of applications. The 9X442 and 9X440 provides the needed USB 2.0 port fanout not provided by the SOC IC. Note that this Pericom product family operates in the industrial temperature range, -40°C to +85°C.
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