XRT83SH38

•Fully integrated eight channel short-haul transceivers for E1,T1 or J1 applications
•Programable Transmit Pulse Shaper for E1,T1 or J1 short-haul interfaces
•Five fixed transmit pulse settings for T1 short-haul applications
•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
•Internal impedance matching for 75, 100, 110 and 120
•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 either in transmit or receive path
•On-chip frequency multiplier generates T1 or E1 Master clocks from variety of external clock sources
•High receiver interference immunity
•On-chip transmit short-circuit protection and limiting, and driver fail monitor output (DMO)
•Receive loss of signal (RLOS) output
•On-chip HDB3/B8ZS/AMI encoder/decoder functions
•QRSS 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 Loop-Back Modes
•Meets or exceeds T1 and E1 short-haul network access specifications in ITU G.703, G.775, G.736 and G.823; TR-TSY-000499; ANSI T1.403 and T1.408; ETSI 300-166 and AT&T Pub 62411
•Supports both Hardware and Host (parallel Microprocessor or Serial) interface for programming
•JTAG Support
•Programmable Interrupt
•Low power dissipation
•Logic inputs accept either 3.3V or 5V levels
•Single 3.3V Supply Operation
•225 ball BGA package
•-40°C to +85°C Temperature Range

The XRT83SH38 is a fully integrated 8-channel short-haul line interface unit (LIU) that operates from a single 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 XRT83SH38 LIU features are programmed through a standard microprocessor interface, serial interface or controlled through Hardware mode. EXAR's XRT83SH38 LIU has patented high impedance circuits that allow the transmitter outputs and receiver inputs to be high impedance when experiencing a power failure or when the LIU is powered off. Key design features within the LIU optimize 1:1 or 1+1 redundancy and non-intrusive monitoring applications to ensure reliability without using relays.

The XRT83SH38 on-chip clock synthesizer generates T1/E1/J1 clock rates from a selectable external clock frequency and outputs a clock reference of the line rate chosen.Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS generation/detection, TAOS, DMO, and diagnostic loopback modes.The above info is from (www.seekic.com)

The XRT83SH38 is a fully integrated 8-channel shorthaul line interface unit (LIU) that operates from a single 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 microprocessor interface, serial interface (BGA package only) or controlled through Hardware mode. EXAR's LIU has patented high impedance circuits that allow the transmitter outputs and receiver inputs to be high impedance when experiencing a power failure or when the LIU is powered off. Key design features within the LIU optimize 1:1 or 1+1 redundancy and non-intrusive monitoring applications to ensure reliability without using relays.

The XRT83SH38 on-chip clock synthesizer generates T1/E1/J1 clock rates from a selectable external clock frequency and outputs a clock reference of the line rate chosen.

Additional features of XRT83SH38 include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS generation/detection, TAOS, DMO, and diagnostic loopback modes.