CD4532 8-Bit Priority Encoder


CD4532 belongs to the 4000 Series CMOS Logic Family of Integrated Circuits (IC’s) constructed with N- and P-channel enhancement mode transistors. CD4532 has an 8-Bit Priority Encoder

CD4532 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.

CD4532 Features

  • Converts from 1 of 8 to binary
  • Provides cascading feature to handle any number of input
  • Group select indicates one or more priority inputs
  • Standard Symmetrical Output Characteristics
  • 100% Tested for Maximum 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 = 15V

CD4532 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

CD4532 Pinout Diagram

CD4532 Pin Description

Pin NoPin NameDescription
1D4Priority Input 5
2D5 Priority Input 6
3D6 Priority Input 7
4D7 Priority Input 8
5EIEnable Input Pin
6Q2Output Pin 3
7Q1 Output Pin 2
8VSSSupply Voltage
9Q0 Output Pin 1
10D0 Priority Input 1
11D1 Priority Input 2
12D2 Priority Input 3
13D3 Priority Input 4
14GSGroup Select Pin
15EOEnable Output Pin
16VDDDrain Voltage

CD4532 Circuit


  • Priority encoder
  • Binary or BCD encoder (keyboard encoding)
  • Floating point arithmetic

CD4532 Alternative Equivalent

Download CD4532 8-Bit Priority Encoder Datasheet from the link given below.