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:

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