CD4017 Decade Counter IC DIP-16 Package

Specifications

• Logic Family:CD4017 
• Counter Type: 5-Stage Johnson Counter
• Decoded Outputs: 10 (High on active)
• Supply Voltage Range: 3.0V to 15V
• Input Voltage (Clock): Compatible with VDD
• Clock Frequency: Up to 5MHz (at 10V VDD)
• Package Type: DIP-16 (Through-Hole)
• Operating Temperature: -55°C to +125°C

Applications

• LED Chasers: The classic "Knight Rider" or "Running Light" effect.
• Frequency Dividers: Divide an input clock by any integer from 2 to 10.
• Binary Counters: Use multiple 4017s to create larger counting sequences.
• Remote Control Switching: Cycle through different relay states with a single button press.
• Musical Sequencers: Create rhythmic triggers for DIY synthesizers.

Unlock New Capabilities

• Past Projects (Prerequisites): If you’ve mastered the basic 555 Timer Blinky circuit, the CD4017 is your natural next step.
• Feature Upgrade: While a 555 Timer only gives you one "on/off" pulse, adding a CD4017 unlocks sequential control, allowing you to trigger 10 different events in a specific order.
• Effort/Requirements: Beginner level. You only need a breadboard, a clock source (like a 555 timer or a physical button), and some LEDs.

Package Includes:

• 1x CD4017 Decade Counter IC DIP-16 Package

Frequently Asked Questions (FAQ)

• What is the maximum voltage for CD4017?
  It can handle up to 15V safely.
• How do I reset the count to zero?
  Apply a HIGH pulse to Pin 15 (Reset).
• Can I cascade multiple CD4017 ICs?
  Yes, use Pin 12 (Carry Out) to clock the next IC.
• Why are all my LEDs staying on?
  Ensure Pin 13 (Clock Inhibit) is connected to Ground.
• What is the output current per pin?
  Typically around 10mA; use a transistor for heavy loads.
• Can it work with a 3.3V ESP32?
  Yes, it operates down to 3V.
• Does it require a crystal oscillator?
  No, it just needs a digital pulse on Pin 14.
• What is a Johnson Counter?
  It’s a ring counter where the last stage is inverted and fed back.
• How many outputs does it have?
  It has 10 decoded outputs (Q0-Q9).
• Is it breadboard compatible?
  Yes, it comes in a standard DIP-16 package.
• Can I use it to drive a relay?
  Not directly; use a ULN2003 or a transistor.
• What happens if I leave Pin 15 floating?
  The IC may reset randomly; always tie it to GND if unused.
• What is the function of Pin 12?
  It provides one pulse for every 10 input pulses (Carry Out).
• How do I make a 1-to-4 counter?
  Connect the 5th output (Pin 1) to the Reset pin (Pin 15).
• Does it have internal pull-up resistors?
  No, inputs should not be left floating.