74ACT169

54AC 74AC16954ACT 74ACT169 4-Stage Synchronous Bidirectional Counter April 1993 54AC 74AC16954ACT 74ACT169 4-Stage Synchronous Bidirectional Counter General 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-toHIGH transition of the Clock Features Y ICC reduced by 50% Y Synchronous counting and loading Y Built-In lookahead carry capability Y Presettable for programmable operation Y Outputs source sink 24 mA Y ’ACT has TTL-compatible inputs Y Standard Military Drawing (SMD) ’AC169 5962-91603 Logic Symbols IEEE IEC Connection Diagrams Pin Assignment for DIP Flatpak and SOIC TL F 9934–1 Pin Names CEP CET CP P0 – P3 PE UD 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 FACTTM is a trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9934 TL F 9934 – 2 TL F 9934 – 3 Pin Assignment for LCC TL F 9934 – 4 RRD-B30M75 Printed in U S A Logic Diagram TL F 9934 – 5 Please note that this diagram is provided only for the understanding of logic operations and should not be used to esti...