78P2351-IGTR 查看數據表（PDF） - Teridian Semiconductor Corporation
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78P2351-IGTR Datasheet PDF : 42 Pages
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DESCRIPTION
The 78P2351 is Teridian’s second generation Line
Interface Unit (LIU) for 155 Mbps (OC-3, STS-3, or
STM-1) and 140 Mbps PDH (E4) telecom interfaces.
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 75Ω coaxial cable using
CMI coding or directly to a fiber optics transceiver
module using NRZ coding. The 78P2351 is
compliant with all respective ANSI, ITU-T, and
Telcordia standards for jitter tolerance, generation,
and transfer.
APPLICATIONS
• Central Office Interconnects
• DSLAMs
• Add Drop Multiplexers (ADMs)
• PDH/SDH test equipment
• Multi Service Switches
• Digital Microwave Radios
78P2351
Single Channel
OC-3/ STM1-E/ E4 LIU
DATA SHEET
SEPTEMBER 2006
FEATURES
• ITU-T G.703 compliant cable driver for 139.264
Mbps or 155.52 Mbps CMI-coded coax
transmission
• Integrated adaptive CMI equalizer and CDR in
receive path handles over 12.7dB of cable loss
• Serial, LVPECL-compatible system interface
with integrated CRU in transmit path for flexible
NRZ to CMI conversion.
• 4-bit parallel CMOS system interface with
master and slave Tx clock modes.
• Selectable LVPECL compatible NRZ media
interface for 155.52 Mbps optical transmission.
• Configurable via HW control pins or 4-wire serial
interface
• 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.
• Receiver Loss of Signal (LOS) detection
compatible with ITU-T G.783
• Operates from a single 3.3V supply
• 100-pin JEDEC LQFP
BLOCK DIAGRAM
SIDP/N
SICKP/N
PICK
PI[3:0]D
PTOCK
SOCKP/N
SODP/N
PO[3:0]D
POCK
Lock Detect
Tx CDR
FIFO
CMI
Encoder
PMOD, SMOD[1:0], PAR
CMI
Decoder
Rx CDR
Lock Detect
CMI
RLBK,
RDSL
Adaptive
Eq.
LOS Detect
LLBK
ECLP/N
TXCKP/N
CMI2P/N
CMIP/N
RXP/N
Page: 1 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4
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