NXP 74HC393D Dual 4-bit Binary Ripple Counter

The NXP 74HC393D is a high-speed Si-gate CMOS device that is part of the 74HC/HCT family characterized by low power consumption and high noise immunity. This integrated circuit is designed to operate in a wide range of applications, from industrial to commercial, making it a versatile component for any digital system requiring reliable counting functionality.

The 74HC393D comprises two identical, independent 4-bit binary ripple counters, each featuring a master reset input (nMR) for synchronous resetting of the counter. Each section of the counter can be used separately or in combination to create larger counters with varying word lengths.

Each 4-bit counter is incremented on the falling edge (negative transition) of the input clock signal (nCP), providing a predictable and stable counting sequence. The counters are cascaded in such a way that the overflow pulse of the first counter triggers the clock input of the second counter, allowing for simple expansion of counting range without the need for additional circuitry.

Key Features of the NXP 74HC393D:

• Wide Operating Voltage: Ranges from 2.0 V to 6.0 V, accommodating various logic level requirements and ensuring compatibility with both TTL and CMOS technologies.
• High-Speed Operation: With a typical clock frequency of up to 100 MHz at 5 V, the 74HC393D is suitable for high-speed applications.
• Low Power Consumption: The IC has a low power dissipation characteristic, making it suitable for battery-operated devices.
• Output Capability: Standard outputs are capable of driving up to 10 LSTTL loads, ensuring good signal integrity.
• Synchronous Reset: A master reset function allows for the synchronous resetting of the counter, providing precise control over the counting sequence.

The 74HC393D is packaged in a 14-pin SOIC configuration, which is suitable for surface-mount technology (SMT) and occupies minimal board space. This, combined with its robustness and high functionality, makes the NXP 74HC393D an excellent choice for designers looking to implement efficient counting solutions in their digital systems.

Whether you're developing timers, frequency dividers, or other digital counters, the NXP 74HC393D provides a reliable and efficient solution that meets the rigorous demands of modern electronic applications.