XRT83L34_05 Datasheet, PDF (2/99 Pages) Exar Corporation – QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR

XRT83L34
xr
REV. 1.0.1 QUAD T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
FIGURE 2. BLOCK DIAGRAM OF THE XRT83L34 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 four Channels, CHANNEL_n - (n=0 : 3)
QRSS
PATTERN
GENERATOR
HDB3/
B8ZS
ENCODER
T X/RX JIT T ER
ATTENUATOR
T IM IN G
CONTROL
DFM
D R IV E
M O N IT O R
TX FILTER
& PULSE
SHAPER
L IN E
D R IV E R
QRSS ENABLE
QRSS
DETECTOR
NETWORK
LOOP
DETECTOR
REMOTE
LOOPBACK
D IG IT A L
LOOPBACK
LOOPBACK
ENABLE
HDB3/
B8ZS
DECODER
T X/RX JIT T ER
ATTENUATOR
TIMING &
DATA
RECOVERY
LBO[3:0]
PEAK
DETECTOR
& SLICER
NLCD ENABLE
LOS
DETECTOR
AIS
DETECTOR
E Q U A L IZ E R
CONTROL
LOCAL
ANALOG
LOOPBACK
RX
E Q U A L IZ E R
TEST
HARWARE CONTROL
MCLKOUT
TAOS_n
DMO_n
T T IP _n
T R IN G _n
TXON_n
RTIP_n
RRING_n
LOOP1_n
LOOP0_n
ICT
RESET
T R A T IO
SR/DR
EQC[4:0]
TCLKE
RCLKE
RXMUTE
ATAOS
FEATURES
• Fully integrated four 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 that can be used 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
• On-chip HDB3/B8ZS/AMI encoder/decoder functions
• QRSS pattern generator and detection for testing and monitoring
2