DS2149 Datasheet, PDF (1/32 Pages) Maxim Integrated Products – 5V T1/J1 Line Interface Unit

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GENERAL DESCRIPTION
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.
APPLICATIONS
Routers
Data Service Units (DSUs)
Channel Service Units (CSUs)
Muxes
Switches
Channel Banks
T1/E1 Test Equipment
PIN CONFIGURATION
TOP VIEW
4 3 2 1 28 27 26
5
25
6
24
7
23
8 DS2149 22
9
21
10
20
11
19
12 13 14 15 16 17 18
PLCC
DEMO KIT AVAILABLE
DS2149
5V T1/J1 Line Interface Unit
FEATURES
§ 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 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
ORDERING INFORMATION
PART
DS2149Q
DS2149QN
TEMP RANGE
0°C to +70°C
-40°C to +85°C
PIN-PACKAGE
28 PLCC
28 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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