XR-T7288 Datasheet, PDF (1/24 Pages) Exar Corporation – CEPT1 Line Interface

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XR-T7288
CEPT1
Line Interface
FEATURES
D Fully Integrated 2.048Mbits/s Line Interface
D Intended For Use In Systems That Must Comply
With CCITT Specifications G.703, G.823, I.431,
G.732, G.735, G.739
D Pin-Selectable 75Ω or 120Ω Operation
D Monolithic Clock Recovery
D Low Power Dissipation:
100mW for 120Ω Twisted Pair, Typical
108mW for 75Ω Coaxial, Typical
June 1997-3
D Minimal External Circuitry Required
D Robust Frequency Acquisition/Phase-Locked Loop
D Pin-Selectable HDB3 Encoder and Decoder
D Loopback Modes for Fault Isolation
D Multiple Link-Status and Alarm Features
D Single-Rail/Dual-Rail Interface
GENERAL DESCRIPTION
The XR-T7288 CEPT1 Line Interface is an integrated
circuit that provides a 2.048 Mbits/s line interface to either
twisted-pair or coaxial cable as specified in CCITT
requirements G.703, G.823, I.431, G.732, and G.735
G.739. The device performs receive pulse regeneration,
timing recovery, and transmit pulse driving functions. The
XR-T7288 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 for surface mounting.
The XR-T7288 device is functionally compatible with the
LC1135B device. The digital circuitry is shown in
Figure 1.; the analog circuitry is shown in Figure 6.
ORDERING INFORMATION
Part No.
XR-T7288IP
XR-T7288IW
Package
28 Lead 300 Mil PDIP
28 Lead 300 Mil Jedec SOJ
Operating
Temperature Range
-40°C to +85°C
-40°C to +85°C
Rev. 1.01
E1992
EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 z [phone] z FAX [phone]
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