74F779 Datasheet, PDF (1/7 Pages) NXP Semiconductors – 8-bit bidirectional binary counter 3-State

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
pins (S₀, S₁). The device also features carry lookahead for
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:
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
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
© 2000 Fairchild Semiconductor Corporation DS009593
www.fairchildsemi.com