GENERAL DESCRIPTION
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-to-HIGH transition of the Clock. n n n n n n Synchronous counting and loading Built-In lookahead carry capability Presettable for programmable operation Outputs source/sink 24 mA ’ACT has TTL-compatible inputs Standard Microcircuit Drawing (SMD) 5962-91603 FEATURES
n ICC reduced by 50% Logic Symbols Pin Names CEP CET CP P0–P3 PE U/D DS100276-1 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 Q0–Q3 TC IEEE/IEC DS100276-2 FACT™ is a trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100276 Connection Diagr...
National Semiconductor
