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.

54191

541

5410

54109

5410CR

5412

54121

54122

54123

54125

54126

5412DM

5412FM