74LS266 Datasheet PDF – Quad 2-Input Exclusive-NOR Gate

What is 74LS266?

This is a Quad 2-input Exclusive-NOR (XNOR) gate IC (integrated circuit) with four independent XNOR gates.

Function: Quad 2-Input Exclusive-NOR Gate

Package: DIP 14 Pin

Manufacturer: Fairchild Semiconductor

Fairchild Semiconductor Corporation, a semiconductor manufacturing company, was acquired by ON Semiconductor Corporation on September 18, 2016.

Image and Pinouts:

74LS266 datasheet



This device contains four independent gates each of which performs the logic exclusive-NOR function. Outputs are open collector.


1. Low power consumption due to its TTL technology

2. Operating voltage range of 4.75V to 5.25V

3. High-speed propagation delay time of 13 ns

4. Inputs and outputs are TTL compatible

5. Can be used as a function generator


1. Provides logic implementation for the XNOR function with the convenience of four independent gates in one package

2. Has a high fan-out capability

3. Can be used in a variety of applications including digital systems, computers, and communication systems

Truth Table

A B Ouputs
L  L   H
L  H   L
H  L   L
H  H   H

Absolute Maximum Ratings

1. Supply Voltage : 7 V
2. Input Voltage : 7 V
3. Operating Free Air Temperature Range : 0°C to +70°C
4. Storage Temperature Range : -65°C to +150°C

Other data sheets are available within the file: 74266, 74LS266M, 74LS266N, DM74LS266M, DM74LS266N

74LS266 Datasheet PDF Download

74LS266 pdf

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