74F161A Datasheet (Texas Instruments) - SYNCHRONOUS 4-BIT BINARY COUNTER

74F161A, SYNCHRONOUS 4-BIT BINARY COUNTER

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 outpu

74F161A Features

* a fully independent clock circuit. Changes at ENP, ENT, or LOAD that modify the operating mode have no effect on the contents of the counter until clocking occurs. The function of the counter (whether enabled, disabled, loading, or counting) is dictated solely by the conditions meeting the setup and