The document introduces the M74HC393, a high-speed CMOS dual binary counter with features such as high speed, low power dissipation, high noise immunity, and symmetrical output impedance. The counter circuit contains independent ripple carry counters and two 4-bit ripple carry binary counters, which can be cascaded to create a single divide by 256 counter. Each 4-bit counter is incremented on the high to low transition (negative edge) of the clock input, and each has an independent clear input. When CLEAR is set to low, all four bits of each counter are set to a low level. This enables count truncation and allows the implementation of divide by N counter configurations. All inputs are equipped with protection circuits against static discharge and transient excess voltage.
The M74HC393 is a high-speed CMOS dual binary counter fabricated with silicon gate CMOS technology. It contains two independent 4-bit ripple carry counters that can be cascaded to create a single divide by 256 counter. Each counter features an independent clear input for truncation and divide-by-N configurations.
| Operating Temperature | -55 to 125 °C |
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The circuit contains two independent 4-bit ripple carry counters.
Yes, it is pin and function compatible with the 74 series 393.