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78P2252 Datasheet

  • 78P2252

  • OC-3 / STM-1 / STS-3 / E4 Transceivers

  • 16頁(yè)

  • ETC

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78P2252
STM-1/OC-3
Transceiver
JUNE 2002
DESCRIPTION
The 78P2252 is a transceiver IC designed for
155.52Mbit/s (OC-3 or STM-1) transmission. It is
used at the interface to a fiber optic module.
Interface to digital framer circuits is accomplished via
a serial PECL or parallel CMOS interface.
The 78P2252 is built in a BiCMOS technology
allowing for high performance with low power
operation. The device automatically adjusts for
operations with either a 3.3V or 5V power supply
and is packaged in a 64-pin TQFP.
FEATURES
鈥?/div>
Compliant with ITU-T G.958 jitter tolerance,
Telcordia TR-NWT-00253, ANSI T1.105.03-
1994, and ANSI T1.105.05-1994
Integrated Clock Recovery Unit (CRU)
Serial PECL Interface
Four and Eight bit Parallel CMOS Interfaces
PECL Interfaces for connection to Fiber
Optic Modules for SONET OC3 applications
Integrated Clock Multiplier PLL
Advanced BiCMOS Process
Available in 64TQFP Package
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鈥?/div>
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鈥?/div>
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BLOCK DIAGRAM
H
HUB/
OST
$
8BIT/
BIT
PAR/
SER
XTAL1
CKIN
TXCK
TXCKP,N
RLBACK
TXDTP,N
TXDT[7:0]
Crystal
Oscillator
XTAL2
Clock
Generator
ECLOUTP
ECLOUTN
RXDTP,N
RXDT[7:0]
RXCKP,N
RXCK
Bias
Clock
Recovery
ECLINP
ECLINN
RFO
LLBACK
LF

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