Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

XRT81L27IV Datasheet(PDF) 1 Page - Exar Corporation

Part # XRT81L27IV
Description  SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
Download  30 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT81L27IV Datasheet(HTML) 1 Page - Exar Corporation

  XRT81L27IV Datasheet HTML 1Page - Exar Corporation XRT81L27IV Datasheet HTML 2Page - Exar Corporation XRT81L27IV Datasheet HTML 3Page - Exar Corporation XRT81L27IV Datasheet HTML 4Page - Exar Corporation XRT81L27IV Datasheet HTML 5Page - Exar Corporation XRT81L27IV Datasheet HTML 6Page - Exar Corporation XRT81L27IV Datasheet HTML 7Page - Exar Corporation XRT81L27IV Datasheet HTML 8Page - Exar Corporation XRT81L27IV Datasheet HTML 9Page - Exar Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 1 / 30 page
background image
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com
áç
áç
áç
áç
XRT81L27
SEVEN CHANNEL E1 LINE INTERFACE UNIT WITH CLOCK RECOVERY
NOVEMBER 2001
REV. 1.1.0
GENERAL DESCRIPTION
The XRT81L27 is an optimized seven-channel, ana-
log, 3.3V, line interface unit, fabricated using low pow-
er CMOS technology. The device contains seven in-
dependent E1 channels, including data and clock re-
covery circuits. It is primarily targeted towards the
SDH multiplexers that accommodate TU12 Tributary
Unit Frames. Line cards in these units multiplex 21 E1
channels into higher SDH rates. Devices with seven
E1 interfaces such as the XRT81L27 provide the
most efficient method of implementing 21-channel
line cards. Each channel performs the driver and re-
ceiver functions necessary to convert bipolar signals
to logical levels and vice versa.
The receiver input accepts transformer or capacitor
coupled signals, while the transmitter is coupled to
the line using a 1:2 step-up transformer. The same
transformer configuration can be used for both bal-
anced 120
Ω and unbalanced 75 Ω interfaces. The
Receiver Loss of Original Detection is compliant to
G.775 and in Host Mode, the number of zeros re-
ceived before RLOS is declared can be increased to
4096 bits. This feature provides the user with the flex-
ibility to implement RLOS specifications that require
greater than G.775 requirements
FEATURES
• Seven (7) Independent E1 (CEPT) Line Interface
Units (Transmitter, Receiver, and Recovery)
• Transmit Output Pulses that are Compliant with the
ITU-T G.703 Pulse Template Requirement for
2.048Mbps (E1) Rates
• On-Chip Pulse Shaping for both 75
Ω and 120Ω line
drivers
• Receiver Can Either Be Transformer or Capacitive-
Coupled to the Line
• Detects and Clears LOS (Loss of Signal) Per ITU-T
G.775 and ETS 300 233 (programmable from Host)
• Compliant with the ITU-T G.823 Jitter Tolerance
Requirements
• 3.3V operation with 5V Input compatibility
• Low power consumption
APPLICATIONS
• SDH and lPDH Multiplexers
• E1 Digital Cross-Connect Systems
• DECT (Digital European Cordless Telephone) Base
Stations
• CSU/DSU Equipment
FIGURE 1. BLOCK DIAGRAM
Channel 6
Channel 5
Channel 4
Channel 3
Channel 2
Channel 1
Channel 0
Encoder
MUX
Timing
Control
TX
Pulse
Shaper
Remote
Loopback
Decoder
MUX
Data & Timing
Recovery
Peak
Detector
Receive
Equalizer
Digital
Loopback
Analog
Loopback
LOS
Detect
Line
Driver
SR/DR
Microprocessor
Serial
Interface
(MSI)
SDO
MODE
RClkP
MCLK
CS
SDI
SClk
Timing
Control
TPOS_n
LOS_n
RNEG_n
RClk_n
RPOS_n
TAOS_n
PDTx_n
TNEG_n
TCLK_n
ICT
TTIP_n
TRING_n
RTIP_n
RRING_n
TClkP
Encoded
PDATA
Encoded
NDATA
MCLK
LBM
LBEN
Global
Control
TCLKP
RST


Similar Part No. - XRT81L27IV

ManufacturerPart #DatasheetDescription
logo
Exar Corporation
XRT8000 EXAR-XRT8000 Datasheet
1Mb / 24P
   CLOCK SYNCHRONIZER/ADAPTER FOR COMMUNICATIONS
XRT8000 EXAR-XRT8000 Datasheet
611Kb / 24P
   Clock Synchronizer/Adapter for Communications
XRT8000D EXAR-XRT8000D Datasheet
1Mb / 24P
   CLOCK SYNCHRONIZER/ADAPTER FOR COMMUNICATIONS
XRT8000ID EXAR-XRT8000ID Datasheet
611Kb / 24P
   Clock Synchronizer/Adapter for Communications
XRT8000IP EXAR-XRT8000IP Datasheet
1Mb / 24P
   CLOCK SYNCHRONIZER/ADAPTER FOR COMMUNICATIONS
More results

Similar Description - XRT81L27IV

ManufacturerPart #DatasheetDescription
logo
Exar Corporation
XRT5997 EXAR-XRT5997 Datasheet
257Kb / 37P
   Seven-Channel E1 Line Interface Unit
XRT5897 EXAR-XRT5897 Datasheet
638Kb / 21P
   Seven-Channel E1 Line Interface
XRT82D20 EXAR-XRT82D20 Datasheet
206Kb / 27P
   SINGLE CHANNEL E1 LINE INTERFACE UNIT
XRT82D20 EXAR-XRT82D20_06 Datasheet
411Kb / 24P
   SINGLE CHANNEL E1 LINE INTERFACE UNIT
logo
Cirrus Logic
CS61318 CIRRUS-CS61318 Datasheet
442Kb / 28P
   E1 LINE INTERFACE UNIT
logo
Exar Corporation
XRT59L921 EXAR-XRT59L921 Datasheet
770Kb / 32P
   TWENTY-ONE CHANNEL E1 LINE INTERFACE UNIT
logo
Intel Corporation
LXT381II INTEL-LXT381II Datasheet
226Kb / 36P
   Octal E1 Line Interface Unit
logo
Cirrus Logic
CS61880 CIRRUS-CS61880 Datasheet
791Kb / 70P
   OCTAL E1 LINE INTERFACE UNIT
logo
Exar Corporation
XR-T5793 EXAR-XR-T5793 Datasheet
164Kb / 16P
   Quad E1 Line Interface Unit
XRT83SL216 EXAR-XRT83SL216_06 Datasheet
871Kb / 42P
   16-CHANNEL E1 SHORT-HAUL LINE INTERFACE UNIT
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com