[Exar]

GENERAL DESCRIPTION
The XRT83VL38 is a fully integrated Octal (eight channel) long-haul and short-haul line interface unit for T1 (1.544Mbps) 100Ω, E1 (2.048Mbps) 75Ω or 120Ω, J1 110Ω or BITS Timing applications.

FEATURES
● Supports Section 13 - Synchronization Interface in ITU G.703 for both Transmit and Receive Paths
● Fully integrated eight channel long-haul or short-haul transceivers for E1,T1 or J1 applications
● Adaptive Receive Equalizer for up to 36dB cable attenuation
● Programable Transmit Pulse Shaper for E1,T1 or J1 short-haul interfaces
● Five fixed transmit pulse settings for T1 short-haul applications plus a fully programmable waveform generator for transmit output pulse shaping available for both T1 and E1 modes
● Transmit Line Build-Outs (LBO) for T1 long-haul application from 0dB to -22.5dB in three 7.5dB steps
● Selectable receiver sensitivity from 0 to 36dB cable loss for T1 @772kHz and 0 to 43dB for E1 @1024kHz
● Receive monitor mode handles 0 to 29dB resistive attenuation along with 0 to 6dB of cable attenuation for E1 and 0 to 3dB of cable attenuation for T1 modes
● Supports 75Ωand 120Ω(E1), 100Ω (T1) and 110Ω (J1) applications
● Internal and/or external impedance matching for 75Ω, 100Ω, 110Ω and 120Ω
● Tri-State transmit output and receive input capability for redundancy applications
● Provides High Impedance for Tx and Rx during power off
● Transmit return loss meets or exceeds ETSI 300-166 standard
● On-chip digital clock recovery circuit for high input jitter tolerance
● Crystal-less digital jitter attenuator with 32-bit or 64-bit FIFO selectable in transmit or receive paths
● On-chip frequency multiplier generates T1 or E1 Master clocks
● High receiver interference immunity (Continue ...)

APPLICATIONS
● BITS Timing
● 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