DS2149

NOT RECOMMENDED FOR NEW DESIGNS

5V T1/J1 Line Interface Unit Complete 5V, T1 Line Interface Unit (LIU) for Short-Haul and Long-Haul Applications

Analog Devices DS2149 Product Info

10 February 2026 6

Features

Fully integrated line interface unit (LIU)

Pin compatible with 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, AT&T 62411

Usable receive sensitivity of 0dB to -36dB, which allows the device to operate on 0.63mm (22AWG) cables up to 6k feet in length

Five line build-out 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

Part details & applications

The DS2149 is a complete T1 line interface unit (LIU) for short-haul and long-haul applications. Receive sensitivity adjusts automatically to the incoming signal and can be limited to -18dB, -26dB, or -36dB. The device can generate the necessary DSX-1 line build-outs or CSU line build-outs of 0dB, -7.5dB, -15dB, and -22.5dB. The on-board crystal-less jitter attenuator requires a 1.544MHz reference clock. The jitter attenuator FIFO is selectable to either 32 bits or 128 bits in depth and can be placed in either the transmit or receive data paths. The DS2149 has diagnostic capabilities such as loopbacks and QRSS pattern generation and detection. The device can also generate and detect the in-band loop-up and loop-down codes specified in AT&T 62411. The device can be configured for control using a serial interface, or for hardware mode. The device fully meets all of the latest T1 specifications including ANSI T1.102-1999, ANSI T1.403-1999, ANSI T1.408, and AT&T 62411.

Applications

Channel Banks
Channel Service Units (CSUs)
Data Service Units (DSUs)
Muxes
Routers/Switches
Routers/Switches
T1/E1 Test Equipment

Subscribe to Welllinkchips !

Your Name

* Email