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Integrated

Circuit

Systems, Inc.

ICS1887

FDDI / Fast Ethernet PHYceiver

TM

General Description

The

ICS1887

is designed to provide high performance clock

recovery and generation for 125 MHz serial data streams. The

ICS1887 is ideally suited for LAN transceiver applications in

either FDDI or Fast Ethernet environments. The

ICS1887

converts NRZ to/from NRZI data in addition to providing a

5-bit parallel digital data transmit and receive interface.

Clock and data recovery is performed on an input serial data

stream or the buffered transmit data depending upon the state

of the loopback input. A continuous clock source will

continue to be present even in the absence of input data.

All internal timing is derived from either a low cost crystal,

differential or single-ended source.

The

ICS1887

utilizes advanced CMOS phase-locked loop

technology which combines high performance and low power

at a greatly reduced cost.

Features

鈥?/div>

Single IC solution to existing designs requiring

multiple devices

Data and clock recovery for 125 MBaud FDDI or Fast

Ethernet applications

Clock multiplication from either a crystal, differential

or single-ended timing source

Continuous clock in the absence of data

No external PLL components

Lock/Loss status indicator output

Loopback mode for system diagnostics

Selectable loop timing mode

PECL driver with settable sink current

Parallel digital transmit and receive data interface

NRZ to/from NRZI data conversion

Consult ICS for optional configurations and data rates

Block Diagram

Pin Configuration

28-Pin SOIC

PHYceiver is a trademark of Integrated Circuit Systems, Inc.

ICS1887RevF112596

型号

版本

描述

厂商

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