Overview
The 7486 / 74HC86 is a high-speed CMOS device containing four independent 2-input XOR gates. The Exclusive-OR function is the foundation of digital arithmetic. It is the core component used to perform binary addition (Sum bit) and is widely used in phase detectors and signal-comparison circuits.
The 74HC86 variant is the modern choice for students, offering the same functionality as the classic TTL 7486 but with much lower power consumption and a wider voltage range (2V to 6V), making it perfectly compatible with Arduino and Raspberry Pi GPIO levels.
Key Features
Quad XOR Capability: Four separate Exclusive-OR gates in a single 14-pin IC.
Arithmetic Ready: Specifically designed for building Adders, Subtractors, and Comparators.
CMOS Efficiency: Low power consumption with high-speed switching transitions.
Robust Logic: High noise immunity and stable output, even in complex breadboard environments.
Technical Specifications
| Feature | Specification |
| Logic Type | XOR (Exclusive OR) |
| Number of Gates | 4 (Quad) |
| Inputs per Gate | 2 |
| Operating Voltage | 2.0V to 6.0V |
| Propagation Delay | ~11ns at 5V |
| Output Current | 5.2mA |
| Package Type | DIP-14 (Standard Breadboard Size) |
Truth Table (The XOR Logic)
| Input A | Input B | Output Y |
| Low (0) | Low (0) | Low (0) |
| Low (0) | High (1) | High (1) |
| High (1) | Low (0) | High (1) |
| High (1) | High (1) | Low (0) |
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