onsemi Logic - Logic - Counters, Dividers - MM74HC393SJX MM74HC393SJX

The MM74HC393SJX is a dual 4-bit binary counter that operates on the negative edge of the clock input. It features two independent ripple carry counters that can be cascaded to form a single divide-by-256 counter. Each counter has a clear input that resets all bits to a low state when activated, allowing for flexible counting configurations. The device supports a wide supply voltage range of 2 to 6 volts and has a typical operating frequency of 50 MHz, with a maximum propagation delay of 13 ns from clock to output. The MM74HC393SJX can drive up to 10 low power Schottky TTL equivalent loads and is functionally equivalent to the 74LS393. It is designed with static discharge protection on all inputs, ensuring reliability in various applications. The device is available in a Pb-Free 14-Lead Small Outline Package (SOP), making it suitable for compact designs.