54ACT163

www.DataSheet4U.com 54AC163 54ACT163 Synchronous Presettable Binary Counter November 1998 54AC163 54ACT163 Synchronous Presettable Binary Counter General Description The ’AC/’ACT163 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. The ’AC/ ’ACT163 has a Synchronous Reset input that overrides counting and parallel loading and allows the outputs to be simultaneously reset on the rising edge of the clock. 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 ’ACT163 has TTL-compatible inputs Standard Microcircuit Drawing (SMD) — ’AC163: 5962-89582 — ’ACT163: 5962-91723 Features n ICC reduced by 50% Logic Symbols Pin Names CEP CET CP SR P0–P3 PE Q0–Q3 DS100275-1 Description Count Enable Parallel Input Count Enable Trickle Input Clock Pulse Input Synchronous Reset Input Parallel Data Inputs Parallel Enable Input Flip-Flop Outputs Terminal Count Output TC IEEE/IEC DS100275-2 FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100275 www.national.com Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100275-3 DS100275-4 Functional Description The ’AC/’ACT163 counts in modulo-16 binary sequence. ...