CD4017 Decade Counter Divider

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CD4017 belongs to the CD4XXX IC family. The CD4017 is a 5-stage divide-by-10 Johnson counter with 10 decoded outputs and a carry out bit. The IC is a 16 pin CMOS decade counter/Divider IC with 10 outputs. It is also known as the ‘Johnson 10 stage decade counter’. It has 10 decoded outputs that give output signal one by one in sequence when a clock signal from the clock input is given. These counters are cleared to their zero count by a logical “1” on their reset line. These counters are advanced on the positive edge of the clock signal when the clock enable signal is in the logical “0” state. CD4017 has a wide range of working voltages, a wide range of working conditions, and can be directly interfaced with TTL, CMOS, and NMOS devices. The IC offers many features such as high noise immunity and low power dissipation.

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Decade counter

A decade counter is a serial digital counter which can count up to 10 decimal digits. It goes through 10 unique combinations of output & RESETS for every new clock input. A BCD counter can count 0000, 0001, 0010, 1000, 1001, 1010, 1011, 1110, 1111, 0000, and 0001 and so on.

CD4017 Key Features

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 Pinout

Pin No	Pin Name	Description
1	Q5	output of counter 5
2	Q1	output of counter 1
3	Q0	output of counter 0
4	Q2	output of counter 2
5	Q6	output of counter 6
6	Q7	output of counter 7
7	Q3	output of counter 3
8	VSS	source supply
9	Q8	output of counter 8
10	Q4	output of counter 4
11	Q9	output of counter 9
12	C-OUT	carry out signal
13	CLK-EN	clock enable signal
14	CLK	clock signal
15	R	reset value
16	VDD	Drain supply