com AUGUST 2006 PRELIMINARY XRT83VSH28 REV.
P1.
0.
0 8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT GENERAL DESCRIPTION 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 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 desig...

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