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XRT83L38IB Datasheet(PDF) 5 Page - Exar Corporation

Part # XRT83L38IB
Description  OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRT83L38IB Datasheet(HTML) 5 Page - Exar Corporation

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XRT83L38
I
REV. 1.0.2
OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
TABLE OF CONTENTS
GENERAL DESCRIPTION................................................................................................. 1
APPLICATIONS ................................................................................................................................1
FIGURE 1. BLOCK DIAGRAM OF THE XRT83L38 T1/E1/J1 LIU (HOST MODE) ............................................................. 1
FIGURE 2. BLOCK DIAGRAM OF THE XRT83L38 T1/E1/J1 LIU (HARDWARE MODE) .................................................... 2
FEATURES...................................................................................................................................... 2
ORDERING INFORMATION .................................................................................................................... 3
FIGURE 3. PACKAGE PIN OUT .................................................................................................................................... 4
TABLE OF CONTENTS ..................................................................................................... I
PIN DESCRIPTION BY FUNCTION................................................................................... 5
RECEIVE SECTIONS ........................................................................................................................ 5
TRANSMITTER SECTIONS ................................................................................................................ 7
MICROPROCESSOR INTERFACE ..................................................................................................... 11
JITTER
ATTENUATOR..................................................................................................................... 14
CLOCK SYNTHESIZER ................................................................................................................... 14
ALARM FUNCTIONS/REDUNDANCY SUPPORT.................................................................................. 16
POWER AND GROUND................................................................................................................... 19
PINS ONLY AVAILABLE IN BGA PACKAGE ............................................................................ 21
FUNCTIONAL DESCRIPTION ......................................................................................... 22
MASTER CLOCK GENERATOR........................................................................................................ 22
FIGURE 4. TWO INPUT CLOCK SOURCE .................................................................................................................... 22
FIGURE 5. ONE INPUT CLOCK SOURCE .................................................................................................................... 22
TABLE 1: MASTER CLOCK GENERATOR .................................................................................................................... 23
RECEIVER........................................................................................................................23
RECEIVER INPUT .......................................................................................................................... 23
RECEIVE MONITOR MODE ............................................................................................................. 24
RECEIVER LOSS OF SIGNAL (RLOS) ............................................................................................. 24
FIGURE 6. SIMPLIFIED DIAGRAM OF -15DB T1/E1 SHORT HAUL MODE AND RLOS CONDITION .................................. 24
FIGURE 7. SIMPLIFIED DIAGRAM OF -29DB T1/E1 GAIN MODE AND RLOS CONDITION .............................................. 25
FIGURE 8. SIMPLIFIED DIAGRAM OF -36DB T1/E1 LONG HAUL MODE AND RLOS CONDITION .................................... 25
FIGURE 9. SIMPLIFIED DIAGRAM OF EXTENDED RLOS MODE (E1 ONLY) ................................................................... 26
RECEIVE HDB3/B8ZS DECODER.................................................................................................. 26
RECOVERED CLOCK (RCLK) SAMPLING EDGE .............................................................................. 26
FIGURE 10. RECEIVE CLOCK AND OUTPUT DATA TIMING........................................................................................... 27
JITTER ATTENUATOR .................................................................................................................... 27
GAPPED CLOCK (JA MUST BE ENABLED IN THE TRANSMIT PATH) .................................................. 27
TABLE 2: MAXIMUM GAP WIDTH FOR MULTIPLEXER/MAPPER APPLICATIONS .............................................................. 27
ARBITRARY PULSE GENERATOR FOR T1 AND E1 ........................................................................... 28
FIGURE 11. ARBITRARY PULSE SEGMENT ASSIGNMENT ............................................................................................ 28
TRANSMITTER ................................................................................................................ 28
DIGITAL DATA FORMAT ................................................................................................................. 28
TRANSMIT CLOCK (TCLK) SAMPLING EDGE .................................................................................. 28
FIGURE 12. TRANSMIT CLOCK AND INPUT DATA TIMING ............................................................................................ 29
TRANSMIT HDB3/B8ZS ENCODER................................................................................................ 29
TABLE 3: EXAMPLES OF HDB3 ENCODING ............................................................................................................... 29
TABLE 4: EXAMPLES OF B8ZS ENCODING ................................................................................................................ 29
DRIVER FAILURE MONITOR (DMO) ............................................................................................... 29
TRANSMIT PULSE SHAPER & LINE BUILD OUT (LBO) CIRCUIT ........................................................ 30
TABLE 5: RECEIVE EQUALIZER CONTROL AND TRANSMIT LINE BUILD-OUT SETTINGS................................................. 30
TRANSMIT AND RECEIVE TERMINATIONS ................................................................. 31
RECEIVER (CHANNELS 0 - 7) ..................................................................................................... 31
Internal Receive Termination Mode ........................................................................................................ 31


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