Texas Instruments

SN74LS266N

SN74LS266N Description

The SN74LS266N from Texas Instruments is a quad 2-input XNOR (Exclusive NOR) gate integrated circuit belonging to the 74LS series of low-power Schottky logic devices. Housed in a 14-pin DIP (Dual Inline Package), it operates within a 4.75V to 5.25V supply range, making it compatible with standard TTL logic levels. This IC is designed for through-hole mounting, ensuring robust mechanical stability in industrial and prototyping applications. With a maximum propagation delay of 30ns at 5V and 15pF load, it offers reliable performance for medium-speed digital logic operations. The device features open-collector outputs, allowing flexible interfacing with higher-voltage circuits or wired-AND configurations.

SN74LS266N Features

• Logic Type: Quad 2-input XNOR gates for logical equivalence operations.
• Open-Collector Outputs: Enables direct drive of higher-voltage loads or bus-oriented systems.
• Low Power Consumption: Quiescent current of 13mA (max) ensures energy efficiency.
• Wide Operating Voltage: 4.75V–5.25V compatibility with TTL systems.
• Robust Input Thresholds: 2V (min) for high-level and 0.8V (max) for low-level inputs.
• High Noise Immunity: Schottky-clamped design reduces susceptibility to signal interference.
• Temperature Range: Operates reliably from 0°C to 70°C, suitable for commercial environments.
• RoHS3 Compliant: Meets modern environmental standards.

SN74LS266N Applications

• Digital Comparators: Ideal for equality-checking circuits in arithmetic logic units (ALUs).
• Parity Generators/Checkers: Used in error-detection systems for data integrity.
• Bus Interface Logic: Open-collector outputs facilitate multi-device communication.
• Control Systems: Employed in state machines and feedback loops for logic validation.
• Prototyping & Education: DIP package simplifies breadboard-based circuit design.

Conclusion of SN74LS266N

The SN74LS266N stands out for its combination of XNOR functionality, open-collector flexibility, and TTL compatibility, making it a versatile choice for digital logic design. Its moderate speed, low power, and robust construction suit applications ranging from industrial control to educational projects. For engineers seeking a reliable, easy-to-integrate logic gate IC, this device offers a balanced mix of performance and practicality.