74HC266-74266 (Quad 2-Input XNOR Gate)

74266 Quad 2-Input Exclusive-NOR Gates

The 74×266 is a chip with four open-collector XNOR gates. This type of output makes it simple to connect it to other chips that use different logic levels. But it also means you can’t use this chip as a direct replacement for a normal XNOR gate chip.

In this guide, you will learn all about this chip and how you can use its XNOR gates in your own circuit.