GENERAL DESCRIPTION

The XRT5997 is an optimized seven-channel analog E1 line interface unit fabricated using low power 3.3V CMOS technology. Each channel consists of both a Transmitter and a Receiver function. The Transmitter accepts a TTL or CMOS level signal from the Terminal Equipment; and outputs this data to the line via bipolar pulses that are compliant to the ITU-T G.703 pulse template for E1. The Receiver accepts an attenuated bipolar line signal (from the remote terminal equipment) and outputs this data to the (near-end) terminal equipment via CMOS level signals.

FEATURES

The Main features are as follows:

? Consists of Seven (7) Independent E1 (CEPT) Line Interface Units (Transmitter and Receiver)

? Generates Transmit Output Pulses that are Compliant with the ITU-T G.703 Pulse Template Requirement for 2.048Mbps (E1) Rates

? On-Chip Pulse Shaping for both 75? and 120? line drivers

? Receiver Can Either Be Transformer or Capacitive-Coupled to the Line

? Detects and Clears LOS (Loss of Signal) Per ITU-T G.775

? Compliant with the ITU-T G.823 Jitter Tolerance Requirements

? Compliant with ITU G. 703 EOS Over-voltage protection Requirement

? Logic Inputs Accept Either 3.3V or 5.0V Levels

? Operates over the Industrial Temperature Range

? Ultra Low Power Dissipation

? +3.3V Supply Operation

APPLICATIONS

? PDH Multiplexers

? SDH Multiplexers

? Digital Cross-Connect Systems

? DECT (Digital European Cordless Telephone) Base Stations

? CSU/DSU Equipment