XRT83SL28 查看數據表（PDF） - Exar Corporation
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XRT83SL28 Datasheet PDF : 47 Pages
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XRT83SL28
8-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
APRIL 2005
GENERAL DESCRIPTION
The XRT83SL28 is a fully integrated 8-channel E1
short-haul LIU which optimizes system cost and
performance by offering key design features. The
XRT83SL28 operates from a single 3.3V power
supply. The LIU features are programmed through a
standard serial microprocessor interface or hardware
control. 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.
REV. 1.0.0
Additional features include TAOS for transmit and
receive, RLOS, LCV, AIS, DMO, and diagnostic
loopback modes.
APPLICATIONS
• ISDN Primary Rate Interface
• CSU/DSU E1 Interface
• E1 LAN/WAN Routers
• Public Switching Systems and PBX Interfaces
• E1 Multiplexer and Channel Banks
• Integrated Multi-Service Access Platforms (IMAPs)
• Integrated Access Devices (IADs)
• Inverse Multiplexing for ATM (IMA) Wireless Base
Stations
FIGURE 1. HOST MODE BLOCK DIAGRAM OF THE XRT83SL28
TCLK
TPOS
TNEG
RCLK
RPOS
RNEG/LCV
1 of 8 Channels
HDB3
Encoder
Timing
Control
Remote
Loopback
Jitter
Attenuator
(Rx or Tx)
Digital
Loopback
HDB3
Decoder
Clock & Data
Recovery
Tx Pulse
Shaper
Peak
Detector
& Slicer
Driver
Monitor
Line
Driver
Analog
Loopback
Rx
Equalizer
DMO
TTIP
TRING
RTIP
RRING
RLOS
AIS & LOS
Detector
ICT
Test
Serial Microprocessor
Interface
Clock Distribution
TxOE
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com
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