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DS21349 Datasheet

  • DS21349

  • 3.3V T1/J1 Line Interface Unit

  • 375.59KB

  • 32頁

  • ETC

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DEMO KIT AVAILABLE
DS21349
3.3V T1/J1 Line Interface Unit
www.maxim-ic.com
GENERAL DESCRIPTION
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鈥攐ne 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.
FEATURES
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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
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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
6
7
8
9
10
11
25
24
23
22
21
20
19
ORDERING INFORMATION
PART
DS21349Q
DS21349QN
TEMP RANGE
0擄C to +70擄C
-40擄C to +85擄C
PIN-PACKAGE
28 PLCC
28 PLCC
DS21349
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.
1 of 32
REV: 010903

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