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SY100S391

Micrel, Inc.

M9999-042307

hbwhelp@micrel.com or (408) 955-1690

FEATURES

s Operates from a single +5V supply

s Differential PECL outputs

s Function and pinout compatible with Fairchild F100K

s Available in 28-pin PLCC packages

DESCRIPTION

The SY100S391 is a hex TTL-to-PECL translator for

converting TTL logic levels to 100K logic levels. The unique

feature of this translator is the ability to do this translation

using only one +5V supply. The differential outputs allow

each circuit to be used as an inverting/non-inverting translator,

or as a differential line driver. A common enable (E), when

LOW, holds all inverting outputs HIGH and all non-inverting

inputs LOW.

The SY100S391 is ideal for those mixed PECL/TTL

applications which only have a +5V supply available. When

used in the differential mode, the S391, due to its high

common mode rejection, overcomes voltage gradients

between the TTL and PECL ground systems.

Rev.: I

Amendment: /0

Issue Date:

April 2007

SY100S391

LOW-POWER

HEX TTL-TO-PECL

TRANSLATOR

Pin

Function

Data Inputs (TTL)

Data Outputs (PECL)

Inverting Data Outputs (PECL)

E

Enable Input (TTL)

PIN NAMES

BLOCK DIAGRAM

E