CD4018 Pre-settable Divide-by-N Counter

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CD4018 is a part of the CD4XXX IC series. It is a presettab;e divide-by-N Counter, made by using the complementary MOS (CMOS) technology. The IC always comes in a 16-pin hermetically selaed dual in line IC packaging. CD4018 has a wide variety of workable volatges, a wide variety of working conditions and can be interfaced directly with other TTL, CMOS, and NMOS devices.

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What is Divide-by-N Counter?

A Divide by N counter refers to a generic counter that divides the input clock frequency by a factor of N ie; in the case of a divide by 2 counter (N=2), in case you cascade four flip-flops, then the output of every stage is divided by 2, if you are taking the output from the 4th flip-flop, then its output clock frequency is equal to 16 (2^4). A Divide by N counter, also known as a frequency divider counter, could be constructed using a single D-type flip-flop.

CD4018 Key Features

Fully static operation
100% tested for quiescent current at 20V
Medium speed operation ….. 10 MHz (typ) at VDD-VSS =10V
Maximum input current 1microAmpere at 18V over full package temperature range; 100 nA at 18V and 25 C

CD4018 Pinout

Pin No	Pin Name	Description
1	D1	data signal 1
2	JAM 1	jam input signal 1
3	JAM 2	jam input signal 2
4	Q2′	complement output signal 2
5	Q1′	complement output signal 1
6	Q3′	complement output signal 3
7	JAM 3	jam input signal 3
8	VSS	source supply
9	JAM 4	jam input signal 4
10	PRE-ENB	preset enable value
11	Q4′	complement output signal 4
12	JAM 5	jam input signal 5
13	Q5′	complement output signal 5
14	CLK	clock signal
15	R	reset value
16	VDD	Drain supply