Data Sheet
January 1998
T7289A DS1 Line Interface
Features
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Fully integrated DS1 line interface
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Intended for use in systems that must comply
with PUB 43802, CB119, TR-TSY-000170, and TRTSY-000499 (Category I equipment)
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Low power dissipation
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On-chip transmit equalization
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Monolithic clock recovery
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High jitter accommodation
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Excellent transmit template performance
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Single-rail/dual-rail interface
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Pin-selectable B8ZS encoder and decoder (during
single-rail mode only)
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Loopback modes for fault isolation
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Multiple link-status and alarm features
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Minimal external circuitry required
Description
The Lucent Technologies Microelectronics Group
T7289A DS1 Line Interface is an integrated circuit
that provides a line interface between the DS1 cross
connect (DSX) and terminal equipment circuits for
cable distances of up to 655 ft. for 22-gauge, plastic,
insulated cable (PIC). The T7289A device performs
receive-pulse regeneration, timing recovery, and
transmit-pulse shaping and equalization functions.
The device is manufactured by using low-power
CMOS technology and is available in a 28-pin, plastic
DIP or in a 28-pin, plastic SOJ package. The T7289A
device is functionally compatible with the T7289,
LC1046A, and LC1046C devices for 1.544 Mbits/s
operation but provides improved jitter transfer and
crosstalk characteristics with a selectable single-rail/
dual-rail system interface.