74LS51 Dual 2-wide 2-input AND/OR Inverter Gate

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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. 74LS51 Dual 2-wide 2-input AND/OR Inverter Gate contains two independent 2-wide 2-input AND-OR-INVERT gates. They perform the Boolean function Y= AB’ + CD’.

74LS51 Features

  • One 2-wide 2-input and 2-wide 3-input AND-OR-INVERT Gate
  • Standard Pin Arrangement
  • Fast Switching Times
  • Operating Temperature up to 70°C
  • Standard TTL Switching Voltages

74LS51 Specifications

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

74LS51 Pinout Diagram

74LS51 Pin Description

Pin NoPin NameDescription
1A1AND/OR Inverter Gate 1 Input 1
2A2 AND/OR Inverter Gate 2 Input 1
3B2 AND/OR Inverter Gate 2 Input 2
4C2 AND/OR Inverter Gate 2 Input 3
5D2 AND/OR Inverter Gate 2 Input 4
6Y2 AND/OR Inverter Gate 2 Output
7GNDGround
8Y1 AND/OR Inverter Gate 1 Output
9D1 AND/OR Inverter Gate 1 Input 6
10E1 AND/OR Inverter Gate 1 Input 5
11F1 AND/OR Inverter Gate 1 Input 4
12B1 AND/OR Inverter Gate 1 Input 2
13C1 AND/OR Inverter Gate 1 Input 3
14VCCPositive Supply

74LS51 Circuit

Applications

  • Data transmission control in digital electronics.
  • Temperature detector circuits.

74LS51 Alternative Equivalent

Download 74LS51 Dual 2-wide 2-input AND/OR Inverter Gate Datasheet from the link given below.