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