© Semiconductor Components Industries, LLC, 2006

November, 2006 − Rev. 8

1

Publication Order Number:

MC10H643/D

MC10H643, MC100H643

Dual Supply ECL to TTL

1:8 Clock Driver

Description

The MC10H/100H643 is a dual supply, low skew translating

1:8 clock driver. Devices in the ON Semiconductor H643 translator

series utilize the PLCC−28 for optimal power pinning, signal flow

through and electrical performance. The dual−supply H643 is similar

to the H641, which is a single−supply 1:9 version of the same function.

The device features a 48 mA TTL output stage, with AC

performance specified into a 50 pF load capacitance. A Latch is

provided on−chip. When LEN is LOW (or left open, in which case it is

pulled LOW by the internal pulldowns) the latch is transparent. A

HIGH on the enable pin (EN) forces all outputs LOW.

The 10H version is compatible with MECL 10H™ ECL logic levels.

The 100H version is compatible with 100K levels.

Features

*For additional information on our Pb−Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

MARKING DIAGRAM*

xxx

= 10 or 100

A

= Assembly Location

WL

= Wafer Lot

YY

= Year

WW

= Work Week

G= Pb−Free Package

PLCC−28

FN SUFFIX

CASE 776

MCxxxH643G

AWLYYWW

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http://onsemi.com

*For additional marking information, refer to

Application Note AND8002/D.

See detailed ordering and shipping information in the package

dimensions section on page 4 of this data sheet.

ORDERING INFORMATION