XR16V554 uart equivalent, 2.25v to 3.6v quad uart.
* Pin-to-pin compatible with ST16C454, ST16C554,
TI’s TL16C554A and Philip’s SC16C554B
* Intel or Motorola Data Bus Interface select
* Four independent UART.
* Portable Appliances
* Telecommunication Network Routers
* Ethernet Network Routers
* Cellular Data De.
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