74F269

74F269 8-Bit Bidirectional Binary Counter April 1988 Revised August 1999 74F269 8-Bit Bidirectional Binary Counter General Description The 74F269 is a fully synchronous 8-stage up/down counter featuring 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 rising edge of the clock. Features s Synchronous counting and loading s Built-in lookahead carry capability s Count frequency 100 MHz s Supply current 113 mA typ s 300 mil slimline package Ordering Code: Order Number 74F269SC 74F269SPC Package Number M24B N24C Package Description 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-100, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbols Connection Diagram IEEE/IEC Function Table PE L CEP X CET X U/D X CP H H H H H X L L X H L L X X H L H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = Transition LOW-to-HIGH      Function Parallel Load All Flip-Flops Hold Hold (TC Held HIGH) Count Up Count Down  © 1999 Fairchild Semiconductor Corporation DS009510 www.fairchildsemi.com 74F269 Unit Loading/Fan Out U.L. Pin Names P0–P7 PE U/D CEP CET CP TC Q0–Q7 Description HIGH/LOW Parallel Data Inputs Parallel Enable Input (Active LOW) Up-D...