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CD4017 - Decade Counter IC

CD4017 - Decade Counter IC

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  • Wide supply voltage range: 3.0V to 15V 
  • High noise immunity: 0.45 VDD (typ.)
  • Low power Fan out of 2 driving 74L TTL compatibility: or 1 driving 74LS 
  • Medium speed operation: 5.0 MHz (typ.) with 10V VDD  
  • Low power: 10 µW (typ.) 
  • Fully static operation 

CD4017 - Decade Counter IC

The CD4017 IC is a decade counter that counts to ten. It has 10 outputs that represent the numbers 0 to 9. The counter increases with one for every rising clock pulse. After the counter has reached 9, it starts again from 0 with the next clock pulse.

This is a great chip for making running LEDs! See a circuit example further down.

check out : Dual Complementary Pair with Inverter IC - CD4007

Pin Overview:

Pinout of CD4017 - Decade Counter IC
Pin Name Pin # Type Description
VDD 16 Power Supply Voltage (+3 to +15V)
GND 8 Power Ground (0V)
Q0-Q9 1-7 and 9-11 Output Qx is high when the counter is x
CO 12 Output Carry Out. Goes high after ten clock pulses
CI 13 Input Clock Inhibit. Ignores clock inputs
CLK 14 Input Clock Input. Increases the counter with one
MR 15 Input Resets the counter to 0

Package Includes:

  • Selected qty of IC - CD4017


Input Voltage (VIN)  −0.5 VDC to VDD +0.5 VDC 
Storage Temperature (TS)  −65°C to +150°C
DC Supply Voltage (VDD)  −0.5 VDC to +18 VDC
Power Dissipation (PD): Dual-In-Line  700 mW
Lead Temperature (TL)   260°C

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What is the CD4017?

  • The CD4017 is a decade counter integrated circuit (IC) that counts the number of pulses or events in a system. It is a type of digital integrated circuit that can be used to implement various counting and sequencing functions in electronic circuits.

How does the CD4017 decade counter IC work?

  • The CD4017 decade counter IC counts the number of pulses that are applied to its clock input. The integrated circuit includes a counter that is incremented with each rising edge of the clock signal. When the count reaches 10, the IC resets to zero and produces a carry-out signal. The count value is displayed on the IC's outputs, with each output corresponding to a different digit in the count's binary representation. The CD4017 can be used to implement a wide range of counting and sequencing functions by connecting different outputs to other circuits.

How to interface the CD4017 with other ICs?

  • The CD4017 can communicate with other ICs by connecting its inputs and outputs to the appropriate pins on the other ICs. For example, the CD4017's clock input can be connected to an oscillator circuit's output to provide the counting signal, and the CD4017's outputs can be connected to the inputs of a display driver to display the count value. The CD4017's other inputs and outputs can be connected to other ICs or circuits to control the CD4017's operation and perform various other functions.