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Fairchild - 8-Bit Bidirectional Binary Counter with 3-STATE Outputs

Numéro de référence 74F579
Description 8-Bit Bidirectional Binary Counter with 3-STATE Outputs
Fabricant Fairchild 
Logo Fairchild 





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74F579 fiche technique
April 1988
Revised August 1999
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:
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” tot he ordering code.
Logic Symbol
Connection Diagram
© 1999 Fairchild Semiconductor Corporation DS009568
www.fairchildsemi.com

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