XRT83VSH28 - Exar Corporation

XRT83VSH28 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT

The XRT83VSH28 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 E1 75Ω or 120Ω mode with minimum external components. The LIU features are programmed through a standard parallel or serial microprocessor inter.

Features

are programmed through a standard parallel or serial microprocessor interface. 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 on-chip clock synthesizer generates an E1 clock reference. Additional features include RLOS, a 16-bit LCV counter for each channel, AIS, QRSS generation/ detection, TAOS, DMO.