XRT4000 Datasheet | Exar

.. Universal Multiprotocol Serial Interface November 1998-2 Features - Software-configurable multiprotocol serial interface supporting: V.35, V.36, EIA-530 (A), RS232 (V.28), X.21, RS449 One chip fully integrated solution (Internal termination) Contains 8 receivers and 8 transmitters for full DTE and DCE support Glitch filters on the control signals (Optional) +5V, +12V, -6V power supplies required Full support of loopbacks, data & clock inversion, and echoed clock in DTE and DCE modes Full support of most popular types of HDLC controllers (single, double, and triple clocks supported) - - - - - Internal oscillator for standalone DTE loopback testing Control signals can be registered and nonregistered Control signals can be tri-stated for bus-based designs “Fail Safe” operation supported ESD Protection Over + 2k V Range - - - - - - APPLICATIONS - - - Data Service Units (DSU) Routers Access Multiplexers GENERAL DESCRIPTION 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 mon types of HDLC controllers. This device contains 8 receivers and 8 transmitters. It is a plete solution containing all of the required source and load terminations in one 100 pin TQFP package. XRT4000 can be configured to operate in one of the seven interfaces in either DTE and DCE modes of operation and power down mode. It fully supports echoed clock as well as clock and data inversion. An elaborate set of loopbacks are supported in DTE and DCE modes of operation. This eliminates the need for external circuitry for loopback implementation. The control signals such as RI, RL, DCD, DTR, DSR are protected against glitches by internal filters. These filters can be disabled. XRT4000 has an internal oscillator which is used to create a clock signal...