54ACT169 Datasheet, PDF (1/11 Pages) Texas Instruments – 4-Stage Synchronous Bidirectional Counter

OBSOLETE
54AC169, 54ACT169
www.ti.com
SNOS092B – JULY 1998 – REVISED APRIL 2013
54AC169 • 54ACT169 4-Stage Synchronous Bidirectional Counter
Check for Samples: 54AC169, 54ACT169
FEATURES
1
•2 I_CC Reduced by 50%
• Synchronous Counting and Loading
• Built-In Lookahead Carry Capability
• Presettable for Programmable Operation
• Outputs Source/Sink 24 mA
• 'ACT has TTL-Compatible Inputs
• Standard Microcircuit Drawing (SMD)
– 5962-91603
DESCRIPTION
The 'AC/'ACT169 is fully synchronous 4-stage
up/down counter. The 'AC/'ACT169 is a modulo-16
binary counter. It features a preset capability for
programmable operation, carry lookahead for easy
cascading and a U/D input to control the direction of
counting. All state changes, whether in counting or
parallel loading, are initiated by the LOW-to-HIGH
transition of the Clock. ^®
Logic Symbols
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
Figure 1. IEEE/IEC
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
is a registered trademark of ~Fairchild Semiconductor.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 1998–2013, Texas Instruments Incorporated