National Semiconductor 54AC161
The ’AC/’ACT161 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.| Part No. | 54AC161 |
|---|---|
| Datasheet | 54AC161 Download |
| Manufacturer |  National Semiconductor |
| Description | Synchronous Presettable Binary Counter |
| Buy | Stock & Price |
GENERAL DESCRIPTION
The ’AC/ ’ACT161 has an asynchronous Master Reset input that overrides all other inputs and forces the outputs LOW. n n n n n n Synchronous counting and loading High-speed synchronous expansion Typical count rate of 125 MHz Outputs source/sink 24 mA ’ACT161 has TTL-compatible inputs Standard Microcircuit Drawing (SMD) — ’AC161: 5962-89561 — ’ACT161: 5962-91722FEATURES
n ICC reduced by 50% Logic Symbols Pin Names CEP CET CP MR P0–P3 PE Q0–Q3 TC DS100274-1DESCRIPTION
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. FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100274 Connection Diagrams Pin Assignment for DIP and Flatpak The Terminal Count (TC) output is HIGH when CET is HIGH and counter is in state 15.
