M74HC191 counters equivalent, 4-bit synchronous up/down counters.
All inputs are equipped with protection circuits against static discharge and transient excess voltage.
Obsolete PIN C.
s The M74HC191 is an high speed CMOS 4-BIT b SYNCHRONOUS UP/DOWN COUNTER O fabricated with silicon gate C2MOS technology. - State changes of the counter are synchronous t(s) with the LOW-to-HIGH transition of the Clock
Pulse Input.
c An asynchronous .
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