54191 counters equivalent, presettable 4-bit binary up/down counters.
Conditions
VCC = 5.0 V CL = 15 pF
Test Conditions VCC = 5.0 V
DEFINITIONS OF TERMS
SETUP TIME (ts) is defined as the minimu.
* Low Power . . . 90 mW Typical Dissipation
* High Speed . . . 25 MHz Typical Count Frequency
* Synchronous.
The LS190 is a synchronous Up / Down BCD Decade Counter and the LS191 is a synchronous Up / Down 4-Bit Binary Counter. The operating modes of the LS190 decade counter and the LS191 binary counter are identical, with the only difference being the coun.
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