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Exar Corporation
Exar Corporation

XRT83SL38 Datasheet Preview

XRT83SL38 Datasheet

OCTAL T1/E1/J1 SH TRANSCEIVER

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XRT83SL38 pdf
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PRELIMINARY
XRT83SL38
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
OCTOBER 2003
REV. P1.1.0
GENERAL DESCRIPTION
The XRT83SL38 is a fully integrated Octal (eight
channel) short-haul line interface unit for T1
(1.544Mbps) 100, E1 (2.048Mbps) 75or 120, or
J1 110applications.
In T1 applications, the XRT83SL38 can generate five
transmit pulse shapes to meet the short-haul Digital
Cross-Connect (DSX-1) template requirements. It
also provides programmable transmit pulse
generators for each channel that can be used for
output pulse shaping allowing performance
improvement over a wide variety of conditions (The
arbitrary pulse generators are available in both T1 and
E1 modes).
The XRT83SL38 provides both a parallel Host
microprocessor interface as well as a Hardware
mode for programming and control.
Both the B8ZS and HDB3 encoding and decoding
functions are selectable as well as AMI. An on-chip
crystal-less jitter attenuator with a 32 or 64 bit FIFO
can be placed either in the receive or the transmit path
with loop bandwidths of less than 3Hz. The
XRT83SL38 provides a variety of loop-back and
diagnostic features as well as transmit driver short
circuit detection and receive loss of signal monitoring.
It supports internal impedance matching for 75Ω,
100Ω, 110and 120for both transmitter and
receiver. In the absence of the power supply, the
transmit outputs and receive inputs are tri-stated
allowing for redundancy applications The chip
includes an integrated programmable clock multiplier
that can synthesize T1 or E1 master clocks from a
variety of external clock sources.
APPLICATIONS
T1 Digital Cross-Connects (DSX-1)
ISDN Primary Rate Interface
CSU/DSU E1/T1/J1 Interface
T1/E1/J1 LAN/WAN Routers
Public switching Systems and PBX Interfaces
T1/E1/J1 Multiplexer and Channel Banks
Features (See Page 2)
FIGURE 1. BLOCK DIAGRAM OF THE XRT83SL38 T1/E1/J1 LIU (HOST MODE)
MCLKE1
MCLKT1
TPOS_n/TDATA_n
TNEG_n/CODES_n
TCLK_n
RCLK_n
RNEG_n/LCV_n
RPOS_n/RDATA_n
RLOS_n
HW/HOST
WR_R/W
RD_DS
ALE-AS
CS
RDY_DTACK
INT
MASTER CLOCK SYNTHESIZER
One of Eight channels, CHANNEL_n - (n= 0:7)
QRSS
PATTERN
GENERATOR
HDB3/
B8ZS
ENCODER
TX/RX JITTER
ATTENUATOR
TAOS
ENABLE
TIMING
CONTROL
DFM
DRIVE
MONITOR
TX FILTER
& PULSE
SHAPER
LINE
DRIVER
QRSS ENABLE
QRSS
DETECTOR
NETWORK
LOOP
DETECTOR
REMOTE
LOOPBACK
DIGITAL
LOOPBACK
LOOPBACK
ENABLE
HDB3/
B8ZS
DECODER
TX/RX JITTER
ATTENUATOR
TIMING &
DATA
RECOVERY
LBO[3:0]
PEAK
DETECTOR
& SLICER
NLCD ENABLE
LOS
DETECTOR
AIS
DETECTOR
EQUALIZER
CONTROL
LOCAL
ANALOG
LOOPBACK
RX
EQUALIZER
TEST
MICROPROCESSOR CONTROLLER
MCLKOUT
DMO_n
TTIP_n
TRING_n
TXON_n
RTIP_n
RRING_n
ICT
µPTS1
µPTS2
D[7:0]
µPCLK
A[7:0]
RESET
Exar Corporation 48720 Kato Road, Fremont CA, 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.com



Exar Corporation
Exar Corporation

XRT83SL38 Datasheet Preview

XRT83SL38 Datasheet

OCTAL T1/E1/J1 SH TRANSCEIVER

No Preview Available !

XRT83SL38 pdf
XRT83SL38
OCTAL T1/E1/J1 SH TRANSCEIVER WITH CLOCK RECOVERY AND JITTER ATTENUATOR
REV. P1.1.0
PRELIMINARY
FIGURE 2. BLOCK DIAGRAM OF THE XRT83SL38 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
TERSELR
XRES0
RXRES1
MASTER CLOCK SYNTHESIZER
One of Eight Channels, CHANNEL_n - (n=0 : 7)
QRSS
PATTERN
GENERATOR
HDB3/
B8ZS
ENCODER
TX/RX JITTER
ATTENUATOR
TIMING
CONTROL
DFM
DRIVE
MONITOR
TX FILTER
& PULSE
SHAPER
LINE
DRIVER
QRSS ENABLE
QRSS
DETECTOR
NETWORK
LOOP
DETECTOR
REMOTE
LOOPBACK
DIGITAL
LOOPBACK
LOOPBACK
ENABLE
HDB3/
B8ZS
DECODER
TX/RX JITTER
ATTENUATOR
TIMING &
DATA
RECOVERY
LBO[3:0]
PEAK
DETECTOR
& SLICER
NLCD ENABLE
LOS
DETECTOR
AIS
DETECTOR
EQUALIZER
CONTROL
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 short-haul transceiv-
ers for E1,T1 or J1 applications
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 avail-
able for both T1 and E1 modes
Selectable receiver sensitivity from 0 to 36dB cable
loss
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 75and 120(E1), 100(T1) and 110
(J1) applications
Internal and/or external impedance matching for
75, 100Ω, 110and 120
Tri-State transmit output and receive input capabil-
ity 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 limit-
ing, and driver fail monitor output (DMO)
Receive loss of signal (RLOS) output
On-chip HDB3/B8ZS/AMI encoder/decoder func-
tions
QRSS pattern generator and detection for testing
and monitoring
Error and Bipolar Violation Insertion and Detection
Receiver Line Attenuation Indication Output in 1dB
steps
Network Loop-Code Detection for automatic Loop-
Back Activation/Deactivation
Transmit All Ones (TAOS) and In-Band Network
Loop Up and Down code generators
Supports Local Analog, Remote, Digital and Dual
Loop-Back Modes
Meets or exceeds T1 and E1 short-haul network
access specifications in ITU G.703, G.775, G.736
2


Part Number XRT83SL38
Description OCTAL T1/E1/J1 SH TRANSCEIVER
Maker Exar Corporation
Total Page 30 Pages
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