The XRT4000 is a fully integrated multiprotocol serial interface. It is a universal device because it supports all of the popular serial physical interfaces such as V.35, V.36, EIA-530 (A), RS232 (V.28), X.21 and RS449. Furthermore it can easily be interfaced with most common types of HDLC controllers. This device contains 8 receivers and 8 transmitters. It is a complete solution containing all of the required source and load terminations in one 100 pin TQFP package.