XRT83L38(2007) データシートの表示（PDF） - Exar Corporation

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XRT83L38
(Rev.:2007)

OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

Exar Corporation 

XRT83L38

OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

REV. 1.0.2

FIGURE 2. BLOCK DIAGRAM OF THE XRT83L38 T1/E1/J1 LIU (HARDWARE MODE)

MCLKE1

MCLKT1

CLKSEL[2:0]

TPOS_n/TDATA_n

TNEG_n/CODES_n

TCLK_n

RCLK_n

RNEG_n/LCV_n

RPOS_n/RDATA_n

RLOS_n

HW/HOST

GAUGE

JASEL1

JASEL0

RXTSEL

TXTSEL

TERSEL1

TERSEL0

RXRES1

RXRES0

MASTER CLOCK SYNTHESIZER

One of Eight Channels, CHANNEL_n - (n=0 : 7)

QRSS

PAT T ERN

GENERAT OR

HDB3/

B8ZS

ENCODER

TX/RX JITTER

AT T ENUAT OR

T IM ING

CONT ROL

DFM

DRIVE

M ONIT OR

TX FILTER

& PULSE

SHAPER

LINE

DRIVER

QRSS ENABLE

QRSS

DETECTOR

NET WORK

LOOP

DETECTOR

REM OT E

LOOPBACK

DIGIT AL

LOOPBACK

LOOPBACK

ENABLE

HDB3/

B8ZS

DECODER

TX/RX JITTER

AT T ENUAT OR

TIMING &

DAT A

RECOVERY

LBO[3:0]

PEAK

DETECTOR

& SLICER

NLCD ENABLE

LOS

DETECTOR

AIS

DETECTOR

EQUALIZER

CONT ROL

LOCAL

ANALOG

LOOPBACK

RX

EQUALIZER

TEST

HARWARE CONTROL

MCLKOUT

TAOS_n

DMO_n

TTIP_n

TRING_n

TXON_n

RTIP_n

RRING_n

LOOP1_n

LOOP0_n

ICT

RESET

TRATIO

SR/DR

EQC[4:0]

TCLKE

RCLKE

RXMUTE

ATAOS

FEATURES

• Fully integrated eight channel long-haul or short-haul transceivers for E1,T1 or J1 applications

• Adaptive Receive Equalizer for up to 36dB cable attenuation

• Programable Transmit Pulse Shaper for E1,T1 or J1 short-haul interfaces

• Five fixed transmit pulse settings for T1 short-haul applications plus a fully programmable waveform

generator for transmit output pulse shaping available for both T1 and E1 modes

• Transmit Line Build-Outs (LBO) for T1 long-haul application from 0dB to -22.5dB in three 7.5dB steps

• Selectable receiver sensitivity from 0 to 36dB cable loss for T1 @772kHz and 0 to 43dB for E1 @1024kHz

• Receive monitor mode handles 0 to 29dB resistive attenuation along with 0 to 6dB of cable attenuation for

E1 and 0 to 3dB of cable attenuation for T1 modes

• Supports 75Ω and 120Ω (E1), 100Ω (T1) and 110Ω (J1) applications

• Internal and/or external impedance matching for 75Ω, 100Ω, 110Ω and 120Ω

• Tri-State transmit output and receive input capability for redundancy applications

• Provides High Impedance for Tx and Rx during power off

• Transmit return loss meets or exceeds ETSI 300-166 standard

• On-chip digital clock recovery circuit for high input jitter tolerance

• Crystal-less digital jitter attenuator with 32-bit or 64-bit FIFO selectable either in transmit or receive path

• On-chip frequency multiplier generates T1 or E1 Master clocks from variety of external clock sources

• High receiver interference immunity

• On-chip transmit short-circuit protection and limiting, and driver fail monitor output (DMO)

• Receive loss of signal (RLOS) output

2

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