The DS21349 is a fully integrated LIU for long-haul or short-haul T1 applications over twisted-pair installations. It interfaces to two twisted-pair lines—one pair for transmit and one pair for receive through an appropriate network interface. The device can be configured for control through software or hardware mode. Software control is accomplished over a serial port, in hardware mode; individual pin settings allow standalone operation. The device provides a precise, crystal-less jitter attenuator that can be placed in either the transmit or receive path.
Key Features
Applications/Uses
Fully integrated line interface unit (LIU)
Pin compatible with LevelOne LXT362
Supports both long haul and short haul
Crystal-less jitter attenuator
Jitter attenuator programmable for transmit or receive path
Meets ANSI T1.102, T1.403, T1.408, and AT&T 62411
Usable receive sensitivity of 0dB to -36dB that allows the device to operate on 0.63mm (22AWG) cables up to 6k feet in length
Five line buildout settings for short-haul applications
Four CSU filters from 0dB to -22.5dB
Transmit/receive performance monitors with driver-fail, monitor-open, and loss-of-signal outputs
Bipolar or NRZ interface
Programmable B8ZS encoder/decoder
QRSS generator/detector
Local, remote, and analog loopbacks
Generates and detects in-band loop-up and loop-down codes
Serial interface provides access to control registers
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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