NXP 74HC4017N Johnson Decade Counter

The NXP 74HC4017N is a high-performance CMOS Johnson decade counter integrated circuit designed to handle a wide range of counting applications in the electronics domain. This versatile component is part of the 74HC series, known for its compatibility with TTL (Transistor-Transistor Logic) levels while offering the low power consumption and high noise immunity inherent to CMOS technology.

The 74HC4017N features 10 decoded outputs and is capable of counting up to 10 pulses, making it an ideal choice for creating sequence-driven circuits. It is commonly used in LED light chasers, frequency dividers, and various timing applications. The device advances the count on the negative-going edge of the clock signal, which ensures reliable operation even in high-speed applications.

Key specifications of the 74HC4017N include:

• Supply voltage ranging from 2V to 6V, accommodating various logic level requirements.
• Low power consumption, with a typical quiescent current of only 20nA, making it suitable for battery-operated devices.
• High noise immunity characteristic of CMOS devices, providing stable performance in electrically noisy environments.
• Capability to directly drive 10 LSTTL loads, allowing for easy integration with other logic families.
• Output current of 25mA per pin, which is sufficient for driving LEDs and other low-power devices.
• Standard DIP (Dual In-line Package) and SOIC (Small Outline Integrated Circuit) package options for flexible PCB (Printed Circuit Board) design.

The device also features a master reset function that clears the counter and resets the decade counter to its zero state. This function can be triggered at any time, regardless of the clock state, providing designers with precise control over the counting sequence.

Overall, the NXP 74HC4017N is a reliable and efficient solution for designers looking to implement counting or sequencing functions within their electronic projects. Its robustness, combined with low power consumption and high noise immunity, makes it a favored choice for a wide array of applications in both commercial and educational settings.