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XRT83L38IB Datasheet(PDF) 2 Page - Exar Corporation |
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XRT83L38IB Datasheet(HTML) 2 Page - Exar Corporation |
2 / 87 page XRT83L38 2 OCTAL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR REV. 1.0.2 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 FIGURE 2. BLOCK DIAGRAM OF THE XRT83L38 T1/E1/J1 LIU (HARDWARE MODE) One of Eight Channels, CHANNEL_n - (n=0 : 7) HW/HOST GAUGE JASEL1 JASEL0 RXTSEL TXTSEL TERSEL1 TERSEL0 RXRES1 RXRES0 ICT 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 RTIP_n RRING_n MASTER CLOCK SYNTHESIZER QRSS PATTERN GENERATOR DMO_n TTIP_n TRING_n TXON_n HDB3/ B8ZS ENCODER TX/RX JITTER ATTENUATOR TIMING CONTROL TX FILTER & PULSE SHAPER LINE DRIVER LOCAL ANALOG LOOPBACK REMOTE LOOPBACK DIGITAL LOOPBACK HDB3/ B8ZS DECODER TX/RX JITTER ATTENUATOR TIMING & DATA RECOVERY PEAK DETECTOR & SLICER QRSS DETECTOR NETWORK LOOP DETECTOR RX EQUALIZER EQUALIZER CONTROL AIS DETECTOR LOS DETECTOR LBO[3:0] LOOPBACK ENABLE NLCD ENABLE QRSS ENABLE HARWARE CONTROL TEST RESET TRATIO SR/DR EQC[4:0] TCLKE RCLKE RXMUTE ATAOS DRIVE MONITOR DFM MCLKOUT TAOS_n LOOP1_n LOOP0_n |
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