78P2352 Datasheet, PDF (1/42 Pages) Teridian Semiconductor Corporation – Dual Channel OC-3/ STM1-E/ E4 LIU

DESCRIPTION
The 78P2352 is Teridian’s second generation Line
Interface Unit (LIU) for 155 Mbps SDH/SONET
(OC-3, STS-3, or STM-1) and 140 Mbps PDH (E4)
telecom interfaces. The device is a dual channel,
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
78P2352 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)
• Multi Service Switches
• Digital Microwave Radios
78P2352
Dual 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 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
port 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
• Standard and thermally enhanced 128-pin
JEDEC LQFP package options
BLOCK DIAGRAM
SIxDP/N
SIxCKP/N
PIxCK
PIx[3:0]D
PTOxCK
Lock Detect
Tx CDR
EACH CHANNEL: Tx
FIFO
CMI
Encoder
PMOD, SMOD[1:0], PAR
ECLxP/N
TXxCKP/N
CMIxP/N
RLBK
SOxCKP/N
SOxDP/N
POx[3:0]D
POxCK
CMI
Decoder
Rx CDR
Lock Detect
CMI
EACH CHANNEL: Rx
Adaptive
Eq.
LOS Detect
LLBK
RXxP/N
Page: 1 of 42
2006 Teridian Semiconductor Corporation
Rev. 2.4