CD4017 IC Decade Counter/Divider – 10-Output CMOS Integrated Circuit

Overview

The CD4017 IC is a 5-stage Johnson decade counter with 10 decoded outputs. It is one of the most versatile and widely used chips for creating timing and sequencing circuits. When it receives a clock signal (usually from a 555 Timer), it advances through its 10 outputs in a “one-hot” fashion—meaning only one pin is high at a time. It is the gold standard for school projects, DIY toys, and basic automation logic.

Key Features

• 10 Decoded Outputs: Drive up to 10 LEDs or transistors in a specific sequence.

• Wide Voltage Range: Operates anywhere from 3V to 15V, making it compatible with 5V Arduinos and 9V batteries.

• Fully Static Operation: It can hold its count indefinitely as long as power is supplied.

• Reset & Inhibit Pins: Gain full control over the count; reset the sequence at any point (e.g., make a 5-LED chaser).

• Breadboard Friendly: Comes in a standard DIP-16 package, perfect for students and prototyping.

Technical Specifications