© 2000 Fairchild Semiconductor Corporation

DS009932

www.fairchildsemi.com

November 1988

Revised February 2000

74AC163 • 74ACT163

Synchronous Presettable Binary Counter

General Description

The AC/ACT163 are high-speed synchronous modulo-16

binary counters. They are synchronously presettable for

application in programmable dividers and have two types

of Count Enable inputs plus a Terminal Count output for

versatility in forming synchronous multistage counters. The

AC/ACT163 has a Synchronous Reset input that overrides

counting and parallel loading and allows the outputs to be

simultaneously reset on the rising edge of the clock.

Features

s Synchronous counting and loading

s High-speed synchronous expansion

s Typical count rate of 125 MHz

s Outputs source/sink 24 mA

s ACT163 has TTL-compatible inputs

Ordering Code:

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

Connection Diagram

Pin Descriptions

Order Number

Package Number

Package Description

74AC163SC

M16A

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

74AC163SJ

M16D

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

74AC163MTC

MTC16

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74AC163PC

N16E

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

74ACT163SC

M16A

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

74ACT163SJ

M16D

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

74ACT163MTC

MTC16

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

74ACT163PC

N16E

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

Pin Names

Description

CEP

Count Enable Parallel Input

CET

Count Enable Trickle Input

CP

Clock Pulse Input

SR

Synchronous Reset Input

Parallel Data Inputs

PE

Parallel Enable Input

Flip-Flop Outputs

TC

Terminal Count Output