78p2351r Maxim Integrated Products, Inc., 78p2351r Datasheet

78p2351r

Manufacturer Part Number

78p2351r

Description

Serial 155m Nrz To Cmi Converter

Manufacturer

Maxim Integrated Products, Inc.

Datasheet

1.78P2351R.pdf (31 pages)

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DESCRIPTION

The 78P2351R is Teridian’s second generation Line

Interface Unit (LIU) for 155 Mbit/s electrical SDH

interfaces (STM1e).

solution that includes an integrated Clock & Data

Recovery in both the transmit and receive paths for

easy, cost efficient NRZ to CMI conversion.

The device interfaces to 75Ω coaxial cable through

wideband transformers and can handle over 12.7dB

of cable loss.

synchronous clocks, the small 78P2351R (7x7mm

MLF package) is ideal for new STM1e (ES1) Small

Form-factor Pluggable (SFP) transceiver modules.

APPLICATIONS

•

BLOCK DIAGRAM

Page: 1 of 31

(CMI Encoded)

75ohm Coax

STM1e SFP modules

SDH/ATM Line Cards

Add Drop Multiplexers (ADMs)

PDH/SDH Test Equipment

Digital Microwave Radios

Multi-Service Switches

By eliminating the needs for

The device is a single chip



2006 Teridian Semiconductor Corporation

Adaptive

Eq.

CDR

78P2351R

FEATURES

•

ENDEC

CMI

ITU-T G.703 compliant, adjustable cable driver

for 155.52 Mbps CMI-coded coax transmission

Integrated adaptive CMI equalizer and CDR in

receive path handles over 12.7dB of cable loss

LVPECL-compatible

integrated CDR in transmit path for flexible NRZ

to CMI conversion

Configurable via HW control pins or 4-wire serial

port interface

Compliant with ANSI T1.105.03-1994; ITU-T

G.813, G.825, G.958; and Telcordia GR-253-

CORE for jitter performance

Receive Loss of Signal (Rx LOS) detection

Receive Monitor Mode handles up to 20dB of

flat loss (at max 6dB cable loss)

Optional fixed backplane equalizer compensates

for up to 1.5m of trace

Operates from a single 3.3V supply

Available in a small 7x7mm 56-pin QFN

package

Industrial Temperature: -40˚C to +85˚C

CDR

NRZ to CMI Converter

Fixed

Eq.

DATA SHEET

system

Tx Disable

TD +

TD -

RD +

RD -

Rx LOS

Serial 155M

78P2351R

interface

AUGUST 2006

(NRZ Encoded)

LVPECL Data

Rev. 2.1

with

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