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74AC169

4-Stage Synchronous Bidirectional Counter

Fairchild Semiconductor 

November 1988

Revised November 1999

74AC169

4-Stage Synchronous Bidirectional Counter

General Description

The AC169 is fully synchronous 4-stage up/down counter.

The AC169 is a modulo-16 binary counter. It features a

preset capability for programmable operation, carry looka-

head for easy cascading and a U/D input to control the

direction of counting. All state changes, whether in count-

ing or parallel loading, are initiated by the LOW-to-HIGH

transition of the Clock.

Features

s ICC reduced by 50%

s Synchronous counting and loading

s Built-In lookahead carry capability

s Presettable for programmable operation

s Outputs source/sink 24 mA

Ordering Code:

Order Number

74AC169SC

74AC169SJ

74AC169MTC

74AC169PC

Package Number

Package Description

M16A

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

M16D

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

MTC16

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

N16E

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

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

Logic Symbols

Connection Diagram

IEEE/IEC

Pin Descriptions

Pin Names

CEP

CET

CP

P0–P3

PE

U/D

Q0–Q3

TC

Description

Count Enable Parallel Input

Count Enable Trickle Input

Clock Pulse Input

Parallel Data Inputs

Parallel Enable Input

Up-Down Count Control Input

Flip-Flop Outputs

Terminal Count Output

FACT is a trademark of Fairchild Semiconductor Corporation.

© 1999 Fairchild Semiconductor Corporation DS009934

www.fairchildsemi.com

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