GENERAL DESCRIPTION
The XRT83SL216 is a fully integrated 16-channel E1 short-haul LIU which optimizes system cost and performance by offering key design features. The XRT83SL216 operates from a single 3.3V power supply. The LIU features are programmed through a standard serial microprocessor interface. EXAR’s LIU has patented high impedance circuits that allow the transmitter outputs and receiver inputs to be placed in a high impedance mode when experiencing a power failure or when the LIU is powered off. Additional features include TAOS for transmit and receive, RLOS, LCV, on chip Jitter Attenuator, AIS detector, and diagnostic loopback modes.

FEATURES
• Fully integrated 16-Channel short haul transceivers for E1 (2.048MHz) applications
• Tri-State on a per channel basis for the transmit selection
• Crystal-Less digital jitter attenuators (JA) with 32-Bit or 64-Bit FIFO for the receive or transmit paths
• Transmit outputs and receive inputs stay in the High Impedance mode upon power failure
• Support for automatic protection switching
• RLOS/AIS according to ITU-T G.775 or ETSI-300-233
• On-Chip HDB3 encoder/decoder for each channel
• On-Chip digital clock recovery circuit for high input jitter tolerance
• On-Chip per channel driver failure monitoring circuit
• On-Chip transmit pulse shaper for CEPT 75Ω and 120Ω line terminations
• High receiver interference immunity
• Transmit return loss meets or exceeds ETS1 300-166
• Meets or exceeds ITU G.703, G,775, G.736 and G.823
• Line code error and bipolar violation detection
• Transmit all ones (TAOS) for the Transmit and Receive Outputs
• Supports local analog, remote, and digital loopback modes
• Supports gapped clocks for mapper/multiplexer applications
• Low Power dissipation
• Single 3.3V supply operation (3V to 5V I/O tolerant)
• 289-Pin STBGA package
• -40°C to +85°C Temperature Range

APPLICATIONS
• ISDN Primary Rate Interface
• CSU/DSU E1 Interface
• E1 LAN/WAN Routers
• Public Switching Systems and PBX Interfaces
• E1 Multiplexer and Channel Banks
• Integrated Multi-Service Access Platforms (IMAPs)
• Integrated Access Devices (IADs)
• Inverse Multiplexing for ATM (IMA) Wireless Base Stations