ICS1887 Datasheet, PDF(2/14 Page) Integrated Circuit Systems

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ICS1887 Datasheet, PDF (2/14 Pages) Integrated Circuit Systems – FDDI / Fast Ethernet PHYceiverTM

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ICS1887

Pin Descriptions

NUMBER

PIN NAME

VSS

TXOFF~2

CD~

TX+

TXâ

VSS

IPRG1

RXâ

RX+

LB~

LOCK

RD4

RD3

VSS

RD2

RD1

RD0

RCLK

VDD

REF_IN

REF_OUT

VDD

TCLK

TD0

TD1

TD2

TD3

TD4

* Active Low Input.

TYPE

TTL-Compatible

TTL-Compatible1

PECL

TTL-Compatible

DESCRIPTION

Negative Supply Voltage

Transmitter Off*

Carrier Detect input*

Positive Transmit serial data output

Negative Transmit serial data output

Negative supply voltage

PECL Output stage current set (TX)

Negative Receive serial data input

Positive Receive serial data input

Loop Back mode select*

Lock detect output

Recovered data output 4

Recovered data output 3

Negative supply voltage

Recovered data output 2

Recovered data output 1

Recovered data output 0

Recovered Receive clock output

Positive supply voltage

Positive reference clock/crystal input

Negative reference clock/crystal output

Positive supply voltage

Transmit clock output

Transmit data input 0

Transmit data input 1

Transmit data input 2

Transmit data input 3

Transmit data input 4

Note:

1. A running production change will be made to this input in the June 1996 time frame to convert this

input from the TTL-compatible to PECL to more closely match applications requirements. See

Substituting the ICS1887 for the AMD PDR & PDT applications note for more information.

2. This pin was formerly used for Loop-Timed operation. If your design did not use loop timing, this

change does not affect you. If your application requires loop timing, please contact ICS.

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