LXT351
T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation
Datasheet
The LXT351 is a full-featured, fully-integrated transceiver for T1 and E1 short-haul
applications. The LXT351 is software switchable between T1 and E1 operation, and offers pulse
equalization settings for all short-haul T1 and E1 line interface (LIU) applications.
The LXT351 offers an Intel/Motorola compatible parallel port for microprocessor control. The
device incorporates advanced crystal-less digital jitter attenuation in either the transmit or
receive data path starting at 3 Hz. B8ZS/HDB3 encoding/decoding and unipolar or bipolar data
I/O are selectable. Loss of signal monitoring and a variety of diagnostic loopback modes can
also be selected.
Applications
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SONET/SDH tributary interfaces
Digital cross connects
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Public/private switching trunk line
interfaces
Microwave transmission systems
Product Features
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Fully integrated transceivers for Short-Haul
T1 or E1 interfaces
Crystal-less digital jitter attenuation
— Select either transmit or receive path
— No crystal or high speed external clock
required
Meet or exceed specifications in ANSI
T1.403 and T1.408; ITU I.431, G.703,
G.736, G.775 and G.823; ETSI 300-166
and 300-233; and AT&T Pub 62411
Supports 75
Ω
(E1 coax), 100
Ω
(T1
twisted-pair) and 120
Ω
(E1 twisted-pair)
applications
Fully restores the received signal after
transmission through a cable with
attenuation of 18dB, at 1024 kHz
Five pulse equalization settings for T1
short-haul applications
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Transmit/receive performance monitors
with Driver Fail Monitor Open (DFM) and
Loss of Signal (LOS) outputs
Selectable unipolar or bipolar data I/O and
B8ZS/HDB3 encoding/decoding
QRSS generator/detector for testing or
monitoring
Output short circuit current limit protection
Local, remote and analog loopback
capability
Compatible with Intel’s LXT360/361 T1/
E1 long haul/short haul transceiver
(Universal LIU)
Multiple register parallel interface
compatible with both Intel and Motorola
microprocessors
Available in 28-pin PLCC and 44-pin
PQFP packages
As of January 15, 2001, this document replaces the Level One document
Order Number: 249030-001
LXT351 — Integrated T1/E1 Short Haul Transceiver with Crystal-less Jitter Attenuation.
January 2001
INTEL [ INTEL CORPORATION ]
