CD4018 Presettable Divide-by-N Counter


CD4018 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4018 has Presettable Divide-by-N Counter

CD4018 has a supply voltage range of 5V to 20V, which is much higher than any contemporary logic family. It has buffered output which improves transfer characteristics by providing very high gain. All inputs are protected against static discharge with diodes to VDD and VSS.

CD4018 Features

  • High Voltage Type (20V Rating)
  • Full Look Ahead Carry for Speed Operations on Long Words
  • Generates 16 Logic Functions of Two Boolean Variables
  • Generates 16 Arithmetic Functions of Two 4 Bit Binary Words
  • A = B comparator Output Available
  • Ripple Carry Input and Output Available
  • Typical Addition Time 200ns at VDD = 10V
  • 100% Tested for Quiescent Current at 20V
  • 5V, 10V and 15V Parametric Ratings
  • Maximum Input Current of 1µA at 18V Over Full Package Temperature Range; 100nA at 18V and +25oC
  • Noise Margin (Over Full Package/Temperature Range)
    • 1V at VDD = 5V
    • 2V at VDD = 10V
    • 2.5V at VDD = 15

CD4018 Specifications

Absolute Maximum Ratings

  • DC Supply Voltage Range, (VDD): -0.5V to +20V (Voltage Referenced to VSS Terminals)
  • Input Voltage Range, All Inputs: -0.5V to VDD +0.5V
  • DC Input Current, Any One Input: ±10mA
  • Operating Temperature Range: -55oC to +125oC Package Types D, F, K, H
  • Storage Temperature Range (TSTG): -65oC to +150oC
  • Lead Temperature (During Soldering): +265oC
  • At Distance 1/16 ± 1/32 Inch (1.59mm ± 0.79mm) from case for 10s Maximum

CD4018 Pinout Diagram

CD4018 Pin Description

Pin NoPin NameDescription
1DATAData Pin
2JAM 1JAM Input 1
3 JAM 2 JAM Input 2
4Q2′Inverted Counter Output 2
5Q1′ Inverted Counter Output 1
6Q3′ Inverted Counter Output 3
7 JAM 3 JAM Input 3
8VSSSupply Voltage
9 JAM 4 JAM Input 4
10PRESET ENABLEPreset Enable Pin
11Q4 Inverted Counter Output 4
12 JAM 5 JAM Input 5
13Q5 Inverted Counter Output 5
14CLKClock Pin
15RESETReset Pin
16VDDDrain Voltage

CD4018 Circuit


  • Programmable decade counters
  • Divide-by:”N” counters/frequency synthesizers
  • Frequency division
  • Counter control/timers

CD4018 Alternative Equivalent

CD4033, CD4024

Download CD4018 Presettable Divide-by-N Counter Datasheet from the link given below.