CD4017 Decade Counter IC SMD Package

CD4017 Decade Counter IC SMD Package 

The CD4017 is a CMOS-based decade counter and divider integrated circuit that counts clock pulses and sequentially activates one of ten decoded outputs. It operates as a Johnson counter with built-in output decoding, meaning each clock pulse advances the HIGH logic level from one output to the next in order (Q0 to Q9). Only one output is HIGH at any given time, making it ideal for sequencing, timing, and counting applications. The IC includes clock, reset, and clock enable controls for flexible operation. With low power consumption, high noise immunity, and a wide operating voltage range, the CD4017 is well suited for digital control systems, LED chasers, and event counting. The SMD package allows compact and space-efficient PCB designs.

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Features

• 10 decoded output lines (Q0–Q9)
• Counts from 0 to 9 (decade counter)
• Johnson counter configuration
• Fully decoded outputs (no external decoder required)
• Only one output HIGH at a time
• Wide supply voltage range (typically 3V to 15V)
• Low power CMOS technology
• High noise immunity
• High fan-out capability
• Clock enable control
• Asynchronous reset input
• Medium to high clock speed operation
• TTL and CMOS compatible
• Compact SMD package

Applications

• LED chaser/runner lights
• Sequential lighting systems
• Event counting circuits
• Frequency division (divide-by-10 counter)
• Timer circuits
• Digital clocks
• Step sequencing
• Display scanning
• Control signal generation
• Embedded and microcontroller projects

cd4017-ic-datasheet