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78P2351 Datasheet

  • 78P2351

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

  • 37頁(yè)

  • ETC

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78P2351
Single Channel
OC-3/ STM1-E/ E4 LIU
TARGET DATASHEET
APRIL 2003
DESCRIPTION
The 78P2351 is TDK鈥檚 second generation LIU for
155 Mbit/s SDH/SONET (OC-3, STS-3, or STM-1)
and 140Mbit/s PDH (E4) applications. The device is
a single chip solution that includes an integrated
CDR in the transmit path for flexible NRZ to CMI
conversion. The device can interface to 75鈩?coaxial
cable using CMI coding or directly to a fiber optics
module using NRZ coding.
The 78P2351 is
compliant with all respective ANSI, ITU-T, and
Telcordia standards for jitter tolerance, generation,
and transfer.
APPLICATIONS
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Central Office Interconnects
DSLAMs
Add Drop Multiplexers (ADMs)
PDH/SDH test equipment
FEATURES
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BLOCK DIAGRAM
G.703 compliant line interface for 139.264 Mbps
or 155.52 Mbps CMI-coded coax transmission.
LVPECL compatible line interface for 155.52
Mbps NRZ-coded fiber applications.
Integrated adaptive CMI equalizer and CDR in
receive path.
Serial, LVPECL-compatible system interface
with integrated CDR in transmit path for NRZ to
CMI conversion.
4-bit parallel CMOS system interface with
master/slave Tx clock modes.
Configurable via HW control pins or 4-wire 碌P
interface
Operates from a single reference clock input.
Compliant with ANSI T1.105.03-1994; ITU-T
G.751, G.813, G.823, G.825, G.958; and
Telcordia GR-253-CORE for jitter performance.
Provides Loss of Lock (LOL), CMI Line Code
Violation (LCV), and G.775 compliant Loss of
Signal (LOS) detection.
Receive and Transmit Monitor Modes
Operates from a single 3.3V supply
100-pin TQFP (JEDEC LQFP) package
Lock Detect
SIDP/N
SICKP/N
PICK
PI[3:0]D
PTOCK
SOCKP/N
SODP/N
PO[3:0]D
POCK
CMI-LCV
Detect
CMI
Decoder
Rx CDR
Lock Detect
Adaptive
Eq.
G.775
LOS
Detect
Tx CDR
FIFO
CMI
Encoder
CMI2P/N
CMIP/N
TXCKP/N
ECLP/N
RXP/N
1

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