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74F269 数据表(PDF) 1 Page - Fairchild Semiconductor |
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74F269 数据表(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page tm April 2007 ©1988 Fairchild Semiconductor Corporation www.fairchildsemi.com 74F269 Rev. 1.0.2 74F269 8-Bit Bidirectional Binary Counter Features ■ Synchronous counting and loading ■ Built-in lookahead carry capability ■ Count frequency 100MHz ■ Supply current 113mA typ. ■ 300mil slimline package 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. Ordering Information Device also available in Tape and Reel. Specify by appending suffix letter “X” to the ordering number. Logic Symbols Connection Diagram Function Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial = Transition LOW-to-HIGH Order Number Package Number Package Description 74F269SC M24B 24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74F269SPC N24C 24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide IEEE/IEC PE CEP CET U/D CP Function L X X X Parallel Load All Flip-Flops HH XX Hold HX HX Hold (TC Held High) HL LH Count Up H LLL Count Down |
类似零件编号 - 74F269_07 |
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类似说明 - 74F269_07 |
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