The M74HC390 dual decade counter features high speed, low power dissipation, high noise immunity, balanced propagation delays and wide operating voltage range.
The M74HC390 is a high-speed CMOS dual decade counter fabricated with silicon gate C2MOS technology. It contains two independent ripple carry counters, where each counter is composed of a divide-by-two and a divide-by-five counter. These counters can be cascaded to form dual decade, dual bi-quinary, or various combination configurations up to a single divide-by-100 counter.
| High noise immunity | Vnin = Vi = 28 % Voc (Min.) |
|---|---|
| Wide operating voltage range | Voc (Opr) = 2V to 6V |
| Supply voltage (Absolute Max) | -0.5 to +7 V |
| Operating temperature | -55 to 125 °C |
The absolute maximum rating for the supply voltage (Vcc) is +7 V.
Each 4-bit counter is increased on the high to low transition (negative edge) of the clock input.
Yes, the divide by two and divide by five counters can be cascaded to form dual decade, dual bi-quinary, or various combination up to a single divide by 100 counter.