GENERAL DESCRIPTION

The XRT83VSH38 is a fully integrated 8-channel short-haul line interface unit (LIU) that operates from a 1.8V and a 3.3V power supply. Using internal termination, the LIU provides one bill of materials to operate in T1, E1, or J1 mode with minimum external components. The LIU features are programmed through a standard parallel or serial microprocessor interface.

FEATURES

? Fully integrated eight channel short-haul transceivers for T1/J1 (1.544MHz) and E1 (2.048MHz) applications

? T1/E1/J1 short haul and clock rate are per port selectable through software without changing components

? Internal Impedance matching on both receive and transmit for 75? (E1), 100? (T1), 110? (J1), and 120? (E1) applications are per port selectable through software without changing components

? Power down on a per channel basis with independent receive and transmit selection

? Five pre-programmed transmit pulse settings for T1 short haul applications per channel

? User programable Arbitrary Pulse mode

? On-Chip transmit short-circuit protection and limiting protects line drivers from damage on a per channel basis

? Selectable Crystal-Less digital jitter attenuators (JA) with 32-Bit or 64-Bit FIFO for the receive or transmit path

? Driver failure monitor output (DMO) alerts of possible system or external component problems

? Transmit outputs and receive inputs may be High impedance for protection or redundancy applications on a per channel basis

? Support for automatic protection switching

? 1:1 and 1+1 protection without relays

? Receive monitor mode handles 0 to 6dB resistive attenuation (flat loss) along with 0 to 6dB cable loss for both T1 and E1

? Loss of signal (RLOS) according to ITU-T G.775/ETS300233 (E1) and ANSI T1.403 (T1/J1)

? Programmable data stream muting upon RLOS detection

? On-Chip HDB3/B8ZS encoder/decoder with an internal 16-bit LCV counter for each channel

? On-Chip digital clock recovery circuit for high input jitter tolerance

? QRSS/PRBS pattern generator and detection for testing and monitoring

? Error and bipolar violation insertion and detection

? Transmit all ones (TAOS) Generators and Detectors

? Supports local analog, remote, digital, and dual loopback modes

? Supports gapped clocks for mapper/multiplexer applications

? 1.8V Digital Inner Core

? 3.3V I/O Supply and Analog Inner Core

? 225 ball BGA package

? -40°C to +85°C Temperature Range

APPLICATIONS

? T1 Digital Cross-Connects (DSX-1)

? ISDN Primary Rate Interface

? CSU/DSU E1/T1/J1 Interface

? T1/E1/J1 LAN/WAN Routers

? Public switching Systems and PBX Interfaces

? T1/E1/J1 Multiplexer and Channel Banks