xrt83l30 Exar Corporation, xrt83l30 Datasheet - Page 2

• Manufacturer Part Number: xrt83l30
• Description: Xrt83l30 -single-channel T1/e1/j1 Long-haul, Short-haul Line Interface Unit
• Manufacturer: Exar Corporation

XRT83L30
SINGLE-CHANNEL T1/E1/J1 LH/SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
FEATURES
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F
IGURE
Fully integrated single-channel long-haul and short-haul transceiver for E1,T1 or J1 applications.
Adaptive Receive Equalizer for cable attenuation of up to 45dB for T1 and 43dB for E1.
Programmable 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.
Programmable Transmit Line Build-Outs (LBO) for T1 long-haul application from 0dB to -22.5dB in three
7.5dB steps.
Tri-State transmit output and receive input capability for redundancy applications
Selectable receiver sensitivity from 0 to 36dB or 0 to 45dB cable loss for T1 @772kHz and 0 to 43dB for E1
@1024kHz.
High receiver interference immunity
Receive monitor mode handles 0 to 29dB resistive attenuation along with 0 to 6dB of cable attenuation for
both T1 and E1 modes.
Supports 75Ω and 120Ω (E1), 100Ω (T1) and 110Ω (J1) applications.
Internal and external impedance matching for 75Ω,100Ω, 110Ω and 120Ω.
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
On-chip transmit short-circuit protection and limiting, and driver fail monitor output (DMO)
TNEG / CODES
RPOS / RDATA
TPOS / TDATA
CLKSEL[2:0]
TXTEST[0:2]
2. B
RNEG / LCV
HW/HOST
TERSEL1
TERSEL0
MCLKE1
MCLKT1
INSBPV
RXRES1
RXRES0
RXTSEL
TXTSEL
JASEL1
JASEL0
GAUGE
QRPD
RCLK
NLCD
RLOS
TCLK
LOCK
D
IAGRAM OF THE
QRSS ENABLE
MASTER CLOCK SYNTHESIZER
GENERATOR
DETECTOR
DETECTOR
NETWORK
PATTERN
QRSS
LOOP
QRSS
ENCODER
DECODER
NLCD ENABLE
HDB3/
HDB3/
B8ZS
B8ZS
XRT83L30 T1/E1/J1 LIU (H
LOOPBACK
REMOTE
DETECTOR
LOS
ATTENUATOR
ATTENUATOR
TX/RX JITTER
TX/RX JITTER
HARWARE CONTROL
2
LOOPBACK
DETECTOR
DIGITAL
AIS
ENABLE
TAOS
CONTROL
RECOVERY
TIMING &
TIMING
ARDWARE
DATA
LOOPBACK
ENABLE
EQUALIZER
CONTROL
TX FILTER
& PULSE
SHAPER
M
DETECTOR
& SLICER
LBO[3:0]
ODE
PEAK
DFM
)
LINE
DRIVER
EQUALIZER
LOOPBACK
MONITOR
ANALOG
LOCAL
DRIVE
RX
TEST
RTIP
RRING
LOOP1
LOOP0
AISD
MCLKOUT
DMO
TTIP
TRING
TXON
JABW
TRATIO
SR/DR
EQC[4:0]
TCLKE
RCLKE
RXMUTE
ATAOS
RESET
REV. 1.0.1
ICT