74HC191D counter equivalent, presettable synchronous 4-bit binary up/down counter.
* Wide supply voltage range from 2.0 to 6.0 V
* CMOS low power dissipation
* High noise immunity
* Latch-up performance exceeds 100 mA per JESD 78 Class I.
Fig. 6 shows a method of causing state changes to occur simultaneously in all stages. The RC outputs propagate the carr.
The 74HC191 is an asynchronously presettable 4-bit binary up/down counter. It contains four master/slave flip-flops with internal gating and steering logic to provide asynchronous preset and synchronous count-up and count-down operation. Asynchronous.
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