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78P7200L Datasheet

  • 78P7200L

  • E3/DS3/STS-1 Transceiver

  • 339.68KB

  • 24页

  • TDK

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TDK SEMICONDUCTOR CORP.
DESCRIPTION
The 78P7200L is a line interface transceiver IC for
E3, DS3, STS-1, North America T3 and ATM
applications. It includes clock recovery and
transmitter pulse shaping functions for applications
using 75-ohm coaxial cable at distances up to 1100
feet. These applications include DSLAMs, T3/E3
digital multiplexers, SONET Add/Drop multiplexers,
PDH equipment, DS3 to Fiber optic and microwave
modems and ATM WAN access for routers and
switches.
The receiver recovers clock and positive data and
negative data from an AMI signal. It can compensate
for over 12dB of cable and 6dB of flat loss. The
transmitter generates a signal that meets the
standard pulse shape requirements.
The 78P7200L is pin and functionally compatible to
the 78P7200. It adds loop-back and clock polarity
selection.
The 78P7200L is manufactured in an advanced
BICMOS process and operates at both 5V and
3.3 V power supply voltages. It consumes less than
95 mA of supply current.
FEATURES
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78P7200L
E3/DS3/STS-1
Transceiver
March 2001
Single chip transmit and receive interface for
E3, DS3 and STS-1 applications.
Interface to 75 ohm coaxial cable over 1100
feet at speeds up to 51.84 Mbps.
Compliant with ANSI T1.102-1993, Telcordia
GR-499-CORE and GR-253-CORE, ITU-T
G.703 and G.823 for jitter tolerance.
Compliant with ATM FORUM af-phy-0034 (E3
public UNI) and af-phy-0054 (DS3 public UNI).
Easily Interfaced to ATM framer ICs such as
PMC 7345 , 7346 QJET and 7321.
Unique clock recovery requires no reference
clock or crystal oscillator.
Receive DS3-high signal
Includes diagnostic loop-back for AMI and digital
signals.
Pin compatible to 78P7200 and 78P2241 (28-
lead PLCC).
28-lead PLCC and 48-lead TQFP packages
3.3 or 5 V operation, ICC<95mA
Input circuit works either Transformer or
Capacitor coupled
BLOCK DIAGRAM
LPBK
LBO
TXEN
TPOS
TNEG
TCLK
Binary
to
AMI
PULSE
SHAPER
LOUTP
LOUTN
RPOS
RNEG
AMI
to
Binary
Data
Slicer
Adaptive
Equalizer
Clock
Recovery
LINP
LINN
RCLK
Biasing
Signal
Detector
LF
LPBK
RFO
LOS

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