74F169 Datasheet | National Semiconductor

Description The ’F169 is a fully synchronous 4-stage up down counter The ’F169 is a modulo-16 binary counter 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 Features Asynchronous counting and loading Built-in lookahead carry capability Presettable for programmable operation mercial 74F169PC Military Package Number N16E Package Description 16-Lead (0 300 Wide) Molded Dual-In-Line 16-Lead Ceramic Dual-In-Line 16-Lead (0 150 Wide) Molded Small Outline JEDEC 16-Lead (0 300 Wide) Molded Small Outline EIAJ 54F169DM (Note 2) 74F169SC (Note 1) 74F169SJ (Note 1) J16A M16A M16D Note 1 Devices also available in 13 reel Use suffix e SCX and SJX Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB Logic Symbols IEEE IEC ’F169 TL F 9488 - 3 TL F 9488 - 9 TRI-STATE is a registered trademark of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9488 RRD-B30M75 Printed in U S A Connection Diagrams Pin Assignment for DIP SOIC and Flatpak Pin Assignment for LCC TL F 9488- 1 TL F 9488 - 2 Unit Loading Fan Out 54F 74F Pin Names Description UL HIGH LOW 10 10 10 20 10 10 10 10 10 10 10 10 50 33 3 50 33 3 Input IIH IIL Output IOH IOL 20 m A b0 6 m A 20 m A b1 2 m A 20 m A b0 6 m A 20 m A b0 6 m A 20 m A b0 6 m A 20 m A b0 6 m A b 1 m A 20 m A b 1 m A 20 m A CEP CET CP P0 - P3 PE U D Q0 - Q3 TC Count Enable Parallel Input (Active LOW) Count Enable Trickle Input (Active LOW) Clock Pulse Input (Active Rising Edge) Parallel Data Inputs Parallel Enable Input (Active LOW) Up-Down Count Control Input Flip-Flop Outputs Terminal Count Output (Active LOW) Functional Description The ’F169 uses edge-triggered J-K type flip-flops and has no constraints on changing the control or data input signals in either state of...