GENERAL DESCRIPTION

The XRT4500 is a fully integrated multiprotocol serial interface. It supports all of the popular serial communication interface standards such as ITU-T V.35, ITUT V.36, EIA530A, RS232 (ITU-T V.28), ITU-T X.21 and RS449. It can easily be interfaced with most common types of Serial Communications Controllers (SCCs).

FEATURES

? Pin Programmable Multiprotocol Serial Interface

? V.35, V.36, EIA-530 A, RS232 (V.28), V.10, V.11, X.21 and RS449 Communication Interface Standards

? V.28, V.10, V.11 and V.35 Electrical Interfaces are ‘CTR2’ Compliant

? Contains On-Chip Source and Load Termination Resistors

? Contains Eight Receivers and Eight Transmitters with Switchable DTE and DCE Modes

? Glitch Filters on the Control Signals (Selectable)

? +5V Single Power Supply with internal DC-DC Converter

? 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)

? High-speed V.28 Driver: 256KHz

? Internal Oscillator for Standalone DTE Loopback Testing

? Control Signals Can Be Registered and Non-registered

? Control Signals Can Be Tri-stated for Bus-based Designs

? “Cable Safe” Operation Supported

? ESD Protection Over ± 1KV Range

? TTL Level Digital Inputs

? TTL/CMOS Digital Outputs

APPLICATIONS

? Data Service Units (DSU)

? Channel Service Units (CSU)

? Routers

? Bridges

? Access Equipment