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74F579 8-Bit Bidirectional Binary Counter with 3-STATE Outputs

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:

Order Number

74F579SC

74F579SJ

74F579PC

Package Number

M20B

M20D

N20A

Package Description

20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide

20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

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 鈥淴鈥?tot he ordering code.

Logic Symbol

Connection Diagram

漏 2000 Fairchild Semiconductor Corporation

DS009568

www.fairchildsemi.com

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