tm

April 2007

©1988 Fairchild Semiconductor Corporation

www.fairchildsemi.com

74F161A, 74F163A Rev. 1.0.2

74F161A, 74F163A

Synchronous Presettable Binary Counter

Features

General Description

The 74F161A and 74F163A are high-speed synchro-

nous modulo-16 binary counters. They are synchro-

nously presettable for application in programmable

dividers and have two types of Count Enable inputs plus

a Terminal Count output for versatility in forming

synchronous multi-stage counters. The 74F161A has an

asynchronous Master-Reset input that overrides all other

inputs and forces the outputs LOW. The 74F163A has a

Synchronous Reset input that overrides counting and

parallel loading and allows the outputs to be simulta-

neously reset on the rising edge of the clock. The

74F161A and 74F163A are high-speed versions of the

74F161 and 74F163.

Ordering Information

Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number.

Connection Diagrams

Order

Number

Package

Number

Package Description

74F161ASC

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

74F161ASJ

M16D

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74F161APC

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

74F163ASC

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow

74F163ASJ

M16D

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74F163APC

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide

74F161A

74F163A