74LS32 Quad 2-input OR Gate


The 74LS series of integrated circuits (ICs) was one of the most popular logic families of transistor-transistor logic (TTL) logic chips. 74LS series is a bipolar, low-power Schottky IC. 74LS32 Quad 2-input OR Gate contains four independent 2-input OR gates.

74LS32 Features

  • Four Independent OR Gates
  • Standard Pin Configuration
  • Fast Switching Times
  • Operating Temperature up to 70°C
  • Standard TTL Switching Voltages

74LS32 Specifications

Supply Voltage4.75 – 5.25Vdc
Maximum Clock Frequency40Mhz
Power Dissipation2mW/gate @100kHz
Minimum Output Current8mA
Propagation Delay10nS
Fan Out (TTL Loads)20

74LS32 Pinout Diagram

74LS32 Pin Description

Pin NoPin NameDescription
1A1OR Gate 1 Input 1
2B1 OR Gate 1 Input 2
3C1 OR Gate 1 Output
4A2 OR Gate 2 Input 1
5B2 OR Gate 2 Input 2
6C2 OR Gate 2 Output
8C3 OR Gate 3 Output
9A3 NAND Gate 3 Input 1
10B3 OR Gate 3 Input 2
11C4 OR Gate 4 Output
12A4 OR Gate 4 Input 1
13B4 OR Gate 4 Input 2
14VCCPositive Supply

74LS32 Circuit


  • Automatic digital control circuits
  • Door Bell Switches

74LS32 Alternative Equivalent

Download 74LS32 Quad 2-input OR Gate Datasheet from the link given below.