XRT82D20IW Exar Corporation, XRT82D20IW Datasheet
XRT82D20IW
Specifications of XRT82D20IW
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XRT82D20IW Summary of contents
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AUGUST 2006 GENERAL DESCRIPTION The XRT82D20 is a fully integrated, single channel, Line Interface Unit (Transceiver) for 75 Ω or 120 Ω E1 (2.048 Mbps) applications. The LIU consists of a receiver with adaptive data slicer for accurate data and ...
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... XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT XRT82D20 IGURE INOUT OF THE RLOS ClkLOS TNEG/CODE RNEG/LCV RClk RPOS/RData TClk TPOS/TData LLoop RLoop DLoop ATM RAOS TAOS ORDERING INFORMATION P # ART XRT82D20IW ACKAGE 28 Lead 300 Mil Jedec SOJ 2 REV. 1.0.8 28 RTIP 27 RRing 26 MuteRx 25 AGND 24 AVDD ...
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REV. 1.0.8 GENERAL DESCRIPTION................................................................................................ 1 FEATURES................................................................................................................................................. 1 APPLICATIONS.......................................................................................................................................... XRT82D20............................................................................................................................... 1 IGURE LOCK IAGRAM OF THE XRT82D20............................................................................................................................................. 2 IGURE INOUT OF THE O I .............................................................................................................................. 2 RDERING NFORMATION T ............................................................................................................ ABLE OF CONTENTS ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT PIN DESCRIPTIONS YMBOL YPE 1 RLOS O Receiver Loss of Signal: This pin toggles Low to indicate the loss of signal at the receive inputs. 2 ClkLOS O ...
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REV. 1.0 YMBOL YPE 11 DLoop I Digital Loop Back enable (active low): Connect this pin to ground to enable Digital Local Loop-back.In Digital loop-back mode, transmit input data after the encoder is looped back ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT YMBOL YPE 22 TTIP O Transmitter TIP Output: Positive bipolar data output to the line. 23 TxLEV I Transmit Level: Tie this pin high for 120 Ω twisted ...
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REV. 1.0 IGURE NTERFACE IMING IAGRAM IN TClk TPOS/TData or TNEG/CODE t TSU t RCD RClk RPOS/RData or RNEG/LCV IGURE NTERFACE IMING IAGRAM IN TClk TPOS/TData t TSU t RCD ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT ELECTRICAL CHARACTERISTICS T ABLE TA = 25°C, VDD = 3.3V± 5V± 5% Unless otherwise specified P ARAMETER Receiver Sensitivity Interference Margin with -6db Cable Loss Input Impedance measured between RTIP or ...
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REV. 1.0 3. ABLE OWER ONSUMPTION INCLUDING TA = -40° to 85°C, VDD = 3.3V± 5% Unless otherwise specified S YMBO P M ARAMETER Power Consumption - ABLE ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT T ABLE Ta = 25°C, Vdd=3.3V ± ± 5% unless otherwise specified P ARAMETER Input High Voltage Input Low Voltage Output High Voltage @IOH=5mA (See Note) VDD=3.3V VDD=5.0v Output Low ...
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REV. 1.0 IGURE ECEIVER AXIMUM ITTER − IGURE ECEIVER ITTER RANSFER 0.5UI ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT IGURE ECEIVER ITTER RANSFER 75% M TERN NPUT ITTER −10 −20 −30 T82D20 Performance −40 −50 − ...
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REV. 1.0.8 SYSTEM DESCRIPTION The XRT82D20 is a single channel E1 transceiver that provides an electrical interface for 2.048Mbps applications. XRT82D20 includes a receive circuit that converts an ITU-T G.703 compliant bipolar signal into a TTL compatible logic levels. The ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT IGURE LLUSTRATION ON HOW THE tSU TPOS TNEG TClk In general, if the XRT82D20 samples a “1” on the TPOS input pin, then the Transmit Section will ultimately generate a ...
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REV. 1.0 ITU-T G.703 P IGURE LLUSTRATION OF THE V = 100% 50% 0% SINGLE CHANNEL E1 LINE INTERFACE UNIT ULSE EMPLATE FOR PPLICATION 269 ns (244 + 25) 194 ns (244 – 50) ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT 1.4 Interfacing the Transmit Section of the XRT82D20 to the Line ITU-T G.703 specifies that the E1 line signal can be transmitted over coaxial cable and terminated with 75 transmitted over twisted-pair and ...
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REV. 1.0.8 F 11. I IGURE LLUSTRATION OF HOW TO INTERFACE THE 3.3V OPERATION ONLY 120 Ω Twisted Pair 120 Ω Signal Source 120 Ω Twisted Pair Load 120 Ω OTES ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT 1.5 Interfacing the Receive Section to the Line The design of the XRT82D20 permits the user to transformer-couple the Receive Section to the line. As mentioned earlier, the specifications for E1 require 75Ω ...
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REV. 1.0 IGURE ECOMMENDED CHEMATIC FOR PPLICATIONS AND OPERATION ONLY 120 Ω Twisted Pair 120 Ω Signal Source 120 Ω Twisted Pair 1. Load 120 ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT 1.6 Capacitively-coupling the Receive Section(s) of the XRT82D20 to the line Capacitive coupling provides a lower cost interface to the line. It must be noted that the line isolation is limited to the ...
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REV. 1.0 IGURE APACITIVELY COUPLING THE 120 Ω Twisted Pair 30.1 Ω 120 Ω Signal Source 30.1 Ω 120 Ω Twisted Pair 2:1 R Load 120 Ω Resistive divider attenuates the input signal by ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT F 16 IGURE APACITIVELY COUPLING THE 75 Ω Coax 75 Ω Signal Source 75 Ω Coax 1.36:1 R Load 75 Ω Resistive divider attenuates the input signal by one-half ...
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REV. 1.0 IGURE APACITIVELY COUPLING THE 120 Ω Twisted Pair 30.1 Ω 120 Ω Signal Source 30.1 Ω 120 Ω Twisted Pair 1.36:1 R Load 120 Ω Resistive divider attenuates the input signal by ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT 2.0 DIAGNOSTIC FEATURES In order to support diagnostic operations, the XRT82D20 supports the following loop-back modes: • Local Loopback • Remote Loopback • Digital Loopback Each of these loop-back modes will be discussed ...
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REV. 1.0.8 2.2 The Remote Loop Back Mode When the XRT82D20 is configured to operate in the Remote Loop-Back Mode, the XRT82D20 will ignore any signals that are input to the TPOS and TNEG input pins. The XRT82D20 will receive ...
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XRT82D20 SINGLE CHANNEL E1 LINE INTERFACE UNIT PACKAGE OUTLINE DRAWING 25 REV. 1.0.8 ...
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... Rev. 1.0.8 Edit Pin 9 and 10 as internal pull-up. Updated new format with new Exar logo. EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infringement ...