74HC266 (Quad 2-Input XNOR Gate)

Overview

The 74HC266 is a high-speed silicon-gate CMOS quad 2-input XNOR gate integrated circuit. Packaged in a compact DIP-14, this IC integrates four independent XNOR gates, making it a fundamental building block for digital logic circuits, comparators, and parity checkers. With a wide supply voltage range and robust output drive, it is an ideal choice for both educational projects and professional embedded systems.

Key Features

• Four Independent XNOR Gates: Each gate provides the logical complement of the XOR function, outputting HIGH when both inputs are equal.
• Wide Supply Voltage Range: Operates from 2V to 6V, making it compatible with TTL, CMOS, and various microcontroller logic levels.
• High-Speed Performance: Silicon-gate CMOS technology ensures fast propagation delays while maintaining low power consumption.
• Standard DIP-14 Package: Through-hole package ideal for breadboarding, perfboard prototyping, and PCB design.
• Broad Temperature Range: Functional from -40°C to +125°C, suitable for industrial and automotive environments.
• Output Current: Sinks and sources up to 5.2mA, enabling direct drive of LEDs and interfacing with other logic families.

Technical Specifications

• Logic Type: XNOR (Exclusive-NOR)
• Number of Gates: 4
• Number of Inputs per Gate: 2
• Package: DIP-14 (Dual In-line Package)
• Number of Pins: 14
• Supply Voltage: 2V to 6V
• Output Current: ±5.2mA (typical)
• Operating Temperature Range: -40°C to +125°C
• Logic Case Style: DIP

Applications & Use Cases

• Digital Comparators: Built-in equality checkers for binary numbers.
• Parity Generators/Checkers: Essential for error detection in data transmission.
• Arithmetic Logic Units: Implementing subtraction and comparison operations.
• Oscillator Circuits: Used as inverters in crystal oscillator configurations.
• Signal Conditioning: Filtering and waveform shaping in digital systems.
• Educational Projects: Ideal for learning digital logic design and Boolean algebra.
• Robotics and Automation: Implementing sensor logic and control algorithms.

What's Included

• 1 × 74HC266 Quad 2-Input XNOR Gate IC (DIP-14)

Compatibility

• Logic Families: Compatible with 74HC, 74HCT, 74LS, and CMOS logic families when voltage levels are matched.
• Microcontrollers: Can be interfaced with Arduino, Raspberry Pi, ESP32, and other 5V or 3.3V logic systems.
• Breadboarding: Standard 0.1-inch pin spacing fits all standard solderless breadboards.

MOKWN Recommendation

For Egyptian electronics enthusiasts, students, and engineers, the 74HC266 is an essential addition to your logic IC collection. Whether you're building a digital comparator for a robotics project or exploring advanced logic design, this XNOR gate IC delivers reliable performance at an affordable price. Pair it with other 74-series ICs from MOKWN to complete your digital lab.