Datasheet Summary
SN74F161A SYNCHRONOUS 4-BIT BINARY COUNTER
SDFS056B
- MARCH 1987
- REVISED AUGUST 2001
D Internal Look-Ahead Circuitry for Fast
Counting
D, DB, OR N PACKAGE (TOP VIEW)
D Carry Output for N-Bit Cascading D Fully Synchronous Operation for Counting
CLR 1 CLK 2
16 VCC 15 RCO description
This synchronous, presettable, 4-bit binary counter has internal carry look-ahead circuitry for use in high-speed counting designs.
A3 B4 C5 D6 ENP 7
14 QA 13 QB 12 QC 11 QD 10 ENT
Synchronous operation is provided by having all
GND 8
9 LOAD flip-flops clocked simultaneously so that the outputs change coincident with each other when so instructed by the count-enable (ENP, ENT) inputs and internal...
