Quad XOR Gate: Datasheet and Application Overview for the onsemi MC74ACT86D

The MC74ACT86D from onsemi is a quad exclusive-OR (XOR) gate integrated circuit housed in a 14-pin SOIC package. As a member of the advanced high-speed CMOS (ACT) logic family, it is designed to operate with TTL input logic levels while providing the benefits of CMOS technology, including lower power consumption and high noise immunity. This device is particularly engineered for use in high-performance computing and digital systems where reliable and fast logic operations are critical.

Each of the four XOR gates in the MC74ACT86D features two inputs and one output. The fundamental logic function is defined by the relationship: if the inputs are different, the output is high; if they are the same, the output is low. This simple yet powerful function makes the IC indispensable for a variety of digital applications, most notably binary addition arithmetic as a key component in half and full adder circuits. Furthermore, it is extensively used in error detection and correction schemes, such as parity checkers and generators, where it calculates the parity bit by performing XOR operations on a data word. Its high-speed capability also makes it suitable for use in frequency doublers and phase comparators within phase-locked loops (PLLs).

A key advantage of the ACT family is its balanced propagation delay, which for the MC74ACT86D is typically around 5ns, ensuring signals are processed swiftly without significant skew. The device supports a wide operating voltage range from 4.5V to 5.5V, making it compatible with standard 5V power supplies. It also boasts a high output drive current, allowing it to drive multiple inputs, which is essential for fan-out in complex digital systems.

ICGOODFIND: The onsemi MC74ACT86D is a robust and versatile quad XOR gate IC, offering an optimal blend of high speed, low power, and noise resistance. Its primary strength lies in its critical role in fundamental digital arithmetic and data integrity circuits, making it a foundational component for system designers.

Keywords: XOR Gate, High-Speed CMOS, Parity Generator, Propagation Delay, Logic Gate IC.