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XRT83L314 Datasheet(PDF) 1 Page - Exar Corporation

Part # XRT83L314
Description  14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
Download  84 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT83L314 Datasheet(HTML) 1 Page - Exar Corporation

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
XRT83L314
14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT
MAY 2004
REV. 1.0.0
GENERAL DESCRIPTION
The XRT83L314 is a fully integrated 14-channel long-
haul and short-haul line interface unit (LIU) that
operates from a single 3.3V power supply.
Using
internal termination, the LIU provides one bill of
materials to operate in T1, E1, or J1 mode
independently on a per channel basis with minimum
external
components.
The
LIU
features
are
programmed through a standard microprocessor
interface. EXAR’s LIU has patented high impedance
circuits that allow the transmitter outputs and receiver
inputs to be high impedance when experiencing a
power failure or when the LIU is powered off. Key
design features within the LIU optimize 1:1 or 1+1
redundancy and non-intrusive monitoring applications
to ensure reliability without using relays.
The on-chip clock synthesizer generates T1/E1/J1
clock rates from a selectable external clock frequency
and has five output clock references that can be used
for external timing (8kHz, 1.544Mhz, 2.048Mhz,
nxT1/J1, nxE1).
Additional features include RLOS, a 16-bit LCV
counter for each channel, AIS, QRSS generation/
detection, Network Loop Code generation/detection,
TAOS, DMO, and diagnostic loopback modes.
APPLICATIONS
T1 Digital Cross Connects (DSX-1)
ISDN Primary Rate Interface
CSU/DSU E1/T1/J1 Interface
T1/E1/J1 LAN/WAN Routers
Public Switching Systems and PBX Interfaces
T1/E1/J1 Multiplexer and Channel Banks
Integrated Multi-Service Access Platforms (IMAPs)
Integrated Access Devices (IADs)
Inverse Multiplexing for ATM (IMA)
Wireless Base Stations
FIGURE 1. BLOCK DIAGRAM OF THE XRT83L314
HDB3/B8ZS
Encoder
Tx Jitter
Attenuator
Timing
Control
Tx Pulse
Shaper &
Pattern Gen
HDB3/B8ZS
Decoder
Rx Jitter
Attenuator
Clock & Data
Recovery
Peak
Detector
& Slicer
Rx
Equalizer
NLCD
Detection
NLCD
Generation
QRSS
Generation
& Detection
Rx Equalizer
Control
AIS & LOS
Detector
Driver
Monitor
1 of 14 Channels
Test
Microprocessor
Interface
Programmable Master
Clock Synthesizer
Line
Driver
Remote
Loopback
Digital
Loopback
Analog
Loopback
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG
8kHzOUT
MCLKE1out
MCLKT1out
MCLKE1Nout
MCLKT1Nout
RTIP
RRING
TRING
TTIP
TxON
RxON
ICT
RxTSEL
TEST
DMO
RLOS


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