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74F579 데이터시트(PDF) 1 Page - Fairchild Semiconductor |
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74F579 데이터시트(HTML) 1 Page - Fairchild Semiconductor |
1 / 8 page © 2000 Fairchild Semiconductor Corporation DS009568 www.fairchildsemi.com April 1988 Revised October 2000 74F579 8-Bit Bidirectional Binary Counter with 3-STATE Outputs General Description The 74F579 is a fully synchronous 8-stage up/down counter with multiplexed 3-STATE I/O ports for bus-ori- ented applications. It features a preset capability for pro- grammable 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 initi- ated by the rising edge of the clock. Features s Multiplexed 3-STATE I/O ports s Built-in lookahead carry capability s Count frequency 100 MHz typical s Supply current 75 mA typical s Guaranteed 4000V minimum ESD protection Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” tot he ordering code. Logic Symbol Connection Diagram Order Number Package Number Package Description 74F579SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide 74F579SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F579PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide |
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