© 2000 Fairchild Semiconductor Corporation

DS009593

www.fairchildsemi.com

April 1988

Revised March 2000

74F779

8-Bit Bidirectional Binary Counter with 3-STATE Outputs

General Description

The 74F779 is a fully synchronous 8-stage up/down

counter with multiplexed 3-STATE I/O ports for bus-ori-

ented applications. All control functions (hold, count up,

count down, synchronous load) are controlled by two mode

easy cascading. All state changes are initiated 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 typ

s Supply current 80 mA typ

s Available in SOIC (300 mil only)

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbol

Connection Diagram

Order Number

Package Number

Package Description

74F779SC

M16B

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

74F779PC

N16E

16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide