74LS26 Quad 2-Input Nand Gate (15V O/C)


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. 74LS26 Contain Quad 2-Input NAND Gates

74LS26 Features

  • Four Independent NAND Gates
  • Open Collector Outputs Require Pull-Up Resistors
  • Also Available in SMD Type
  • Operating Temperature to 70°C
  • Standard TTL Switching Voltages

74LS26 Specifications

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

74LS26 Pinout Diagram

74LS26 Pin Description

Pin NoPin NameDescription
1A1NAND Gate 1 Input 1
2B1 NAND Gate 1 Input 2
3C1 NAND Gate 1 Output
4A2 NAND Gate 2 Input 2
5B2 NAND Gate 2 Input 2
6C2 NAND Gate 2 Output
8C4 NAND Gate 4 Output 4
9A4 NAND Gate 4 Input 2
10B4 NAND Gate 4 Input 2
11C3 NAND Gate 3 Output
12A3 NAND Gate 3 Input 2
13B3 NAND Gate 3 Input 2
14VCCPositive Supply

74LS26 Circuit

Here is a simple circuit of NAND Gate using transistor and diodes.

74LS26 Alternative Equivalent

74LS03, 74LS10, 74LS20, 74LS30

Download TITLE Datasheet from the link given below.