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 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.

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 + 2kV Range

APPLICATIONS
• Data Service Units (DSU)
• Routers
• Access Multiplexers