Mm54hc190/mm74hc190 Synchronous Decade Up/down Counters With Mode Control Mm54hc191/mm74hc191 Synchronous Binary Up/down Counters With Mode Control - National Semiconductor

These high speed synchronous Counters MM54HC190 MM74HC190 MM54HC191 MM74HC191 utilize advanced silicon-gate CMOS technology. They possess the high noise immunity and low power consumption of CMOS technology, along with the speeds of low power Schottky TTL. These circuits are synchronous, reversible, up/down count- ers. The MM54HC191 MM74HC191 are 4-bit binary count- ers and the MM54HC190 MM74HC190 are BCD Counters Synchronous operation is provided by having all Flip-Flops clocked simultaneously, so that the outputs change simulta- neously when so instructed by the steering Logic This mode of operation eliminates the output counting spikes normally associated with asynchronous (ripple clock) Counters The outputs of the four master-slave Flip-Flops are triggered on a low-to-high level transition of the Clock input, if the enable input is low. A high at the enable input inhibits count- ing. The direction of the count is determined by the level of the down/up input. When low, the Counter counts up and when high, it counts down. By National Semiconductor Corporation
MM54HC190 's PackagesMM54HC190 's pdf datasheet
MM74HC190
MM54HC191
MM74HC191




MM54HC190 Pinout will be updated soon..., now you can download the pdf datasheet to check the pinouts !
MM54HC190 circuits will be updated soon..., now you can download the pdf datasheet to check the circuits!

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