Datasheet Summary
4 BIT SYNCHRONOUS UP/DOWN COUNTERS s HIGH SPEED : fMAX = 61 MHz (TYP.) at VCC = 6V s LOW POWER DISSIPATION:
ICC =4µA(MAX.) at TA=25°C s HIGH NOISE IMMUNITY:
) VNIH = VNIL = 28 % VCC (MIN.) t(s s SYMMETRICAL OUTPUT IMPEDANCE:
|IOH| = IOL = 4mA (MIN) uc s BALANCED PROPAGATION DELAYS: d tPLH ≅ tPHL ro s WIDE OPERATING VOLTAGE RANGE: P VCC (OPR) = 2V to 6V s PIN AND FUNCTION PATIBLE WITH te 74 SERIES 191 ole DESCRIPTION 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 parallel...