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54AC161L View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
54AC161L Synchronous Presettable Binary Counter National-Semiconductor
National ->Texas Instruments National-Semiconductor
54AC161L Datasheet PDF : 13 Pages
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November 1998
54AC161 54ACT161
Synchronous Presettable Binary Counter
General Description
The ’AC/’ACT161 are high-speed synchronous modulo-16
binary counters. They are synchronously presettable for ap-
plication in programmable dividers and have two types of
Count Enable inputs plus a Terminal Count output for versa-
tility in forming synchronous multistage counters. The ’AC/
’ACT161 has an asynchronous Master Reset input that over-
rides all other inputs and forces the outputs LOW.
n Synchronous counting and loading
n High-speed synchronous expansion
n Typical count rate of 125 MHz
n Outputs source/sink 24 mA
n ’ACT161 has TTL-compatible inputs
n Standard Microcircuit Drawing (SMD)
— ’AC161: 5962-89561
— ’ACT161: 5962-91722
Features
n ICC reduced by 50%
Logic Symbols
DS100274-1
Pin Names
CEP
CET
CP
MR
P0– P3
PE
Q0– Q3
TC
Description
Count Enable Parallel Input
Count Enable Trickle Input
Clock Pulse Input
Asynchronous Master Reset Input
Parallel Data Inputs
Parallel Enable Inputs
Flip-Flop Outputs
Terminal Count Output
IEEE/IEC
DS100274-2
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100274
www.national.com
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