The SN74HC266N (or 74HC266N) is a high-speed CMOS Quadruple 2-Input Exclusive-NOR (XNOR) Gate IC featuring open-drain outputs. Housed in a standard 14-pin Plastic Dual In-line Package (PDIP-14), it contains four independent logic gates that compare two binary input signals and release an open-drain High-Impedance state when inputs match or pull Low when inputs differ. The open-drain output architecture allows easy wire-ANDing logic operations, level translation, and driving bus lines using external pull-up resistors.

This product is featured by Famephase Electronic Accessories as an essential digital logic component for phase detection, equality checkers, active low comparator circuits, and custom logic controllers.