XRT5997集成电路（IC）的电信规格书PDF中文资料

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 75Ω and 120Ω 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