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54AC161F View Datasheet(PDF) - National ->Texas Instruments

Part NameDescriptionManufacturer
54AC161F Synchronous Presettable Binary Counter National-Semiconductor
National ->Texas Instruments National-Semiconductor
54AC161F 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
n ICC reduced by 50%
Logic Symbols
Pin Names
P0– P3
Q0– Q3
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
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FACTis a trademark of Fairchild Semiconductor Corporation.
© 1998 National Semiconductor Corporation DS100274
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