74HC86D,652

Logic - Gates and Inverters

The 74HC86D,652 is a quad two-input XOR logical function gate. It is a part of the Toshiba 74HC CMOS Logic series of digital logic devices, which are based on silicon gate technology and designed for high-speed applications. More specifically, this gate is a Quad Exclusive-OR gate, meaning that it will produce a high (1) output only when its two inputs are different. Otherwise, the output is low (0). The device has a wide voltage range design so it is suitable for both TTL and CMOS logic applications.

Application Field

The 74HC86D,652 is typically used in applications where a two input comparator is desired. Comparators are used in a variety of applications, such as design control systems and signal processing. Comparators can also be used to compare two digital values, which can be useful in logic gate types, parity checking, and signal-detection circuits. The 74HC86D,652 is often used in memory circuits and signal noise reduction.

Working Principle

The 74HC86D,652 is designed to have two input signals (A0 and B0) that are converted into a single output signal (Q0). If both signals perform the same logical state (both high or both low), the output (Q0) will be low. However, if only one of the two inputs (A0 or B0) is high, then the output Q0 will be high. This is a classical XOR operation. The circuit also has three other sets of inputs and outputs that work in a similar fashion.

The device uses CMOS inverters (p-channel and n-channel MOSFETs) which are wired in series. Each input signal (A0,B0,A1,B1,A2,B2 and A3,B3) is applied to both MOSFETs. This setup allows the device to detect if both signals are either high or low. If both signals have the same state, then both MOSFETs will not be activated and no current will flow, thus resulting into a low output at Q0. On the other hand, if both signals have a different state, then current will flow and the device will activate the output (Q0) to a high state.

The 74HC86D,652 can be powered by either 3V or 5V power supplies, making it suitable for both low and high-speed applications. Additionally, its low power consumption makes it ideal for battery-operated portable or mobile applications.

The 74HC86D,652 has a propagation delay time of 4.1ns (typical), which makes it one of the faster two-input XOR logic gate devices available in the market. Furthermore, its high input impedance helps reduce the loading on the input line, making it ideal for applications that demand higher levels of noise and crosstalk immunity.