DEMO KIT AVAILABLE
DS2149
5V T1/J1 Line Interface Unit
www.maxim-ic.com
GENERAL DESCRIPTION
FEATURES
The DS2149 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.
CꢀFully Integrated Line Interface Unit (LIU)
CꢀPin Compatible with LevelOne LXT362
CꢀSupports Both Long Haul and Short Haul
CꢀCrystal-Less Jitter Attenuator
CꢀJitter Attenuator Programmable for Transmit
or Receive Path
CꢀMeets ANSI T1.102, T1.403, T1.408, and
AT&T 62411
CꢀUsable Receive Sensitivity of 0dB to -36dB
That Allows the Device to Operate on
0.63mm (22AWG) Cables Up to 6k Feet in
Length
CꢀFive Line Build-Out Settings for Short-Haul
Applications
APPLICATIONS
Routers
CꢀFour CSU Filters from 0dB to -22.5dB
CꢀTransmit/Receive Performance Monitors
with Driver-Fail, Monitor-Open, and Loss-
of-Signal Outputs
Data Service Units (DSUs)
Channel Service Units (CSUs)
Muxes
CꢀBipolar or NRZ Interface
Switches
CꢀProgrammable B8ZS Encoder/Decoder
CꢀQRSS Generator/Detector
Channel Banks
T1/E1 Test Equipment
CꢀLocal, Remote, and Analog Loopbacks
CꢀGenerates and Detects In-Band Loop-Up and
Loop-Down Codes
PIN CONFIGURATION
CꢀSerial Interface Provides Access to Control
Registers
TOP VIEW
4
3 2 1 28 27 26
ORDERING INFORMATION
25
24
23
22
21
20
19
5
6
PART
TEMP RANGE
PIN-PACKAGE
7
DS2149Q
0°C to +70°C
28 PLCC
28 PLCC
8
DS2149
9
DS2149QN
-40°C to +85°C
10
11
12 13 14 15 16 17 18
PLCC
Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device
may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata.
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REV: 113004