74F86SJ

Current - Output High, Low:	1mA, 20mA
Base Part Number:	74F86
Package / Case:	14-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	14-SOP
Mounting Type:	Surface Mount
Operating Temperature:	0°C ~ 70°C
Max Propagation Delay @ V, Max CL:	7ns @ 5V, 50pF
Logic Level - High:	2V
Logic Level - Low:	0.8V
Series:	74F
Voltage - Supply:	4.5 V ~ 5.5 V
Features:	--
Number of Inputs:	2
Number of Circuits:	4
Logic Type:	XOR (Exclusive OR)
Part Status:	Obsolete
Packaging:	Tube

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Overview of 74F86SJ

The 74F86SJ is a quad two-input XOR gate integrated circuit (IC) manufactured by Fairchild Semiconductor. It is classified under the Logic – Gates and Inverters family of logic ICs, and is used to implement a variety of logic operations. This article provides a brief overview of the 74F86SJ’s major features, application field and working principle.

Features of 74F86SJ

The 74F86SJ is a 14-pin IC featuring four XOR (Exclusive OR) gates. It is capable of operating both as an inverter (when one input is tied to a VCC or ground) and as a standard XOR gate (when two inputs are present). Its built-in clamping diodes allow for protection from electrical spikes and transients with increased noise immunity. The 74F86SJ is designed and tested to eliminate “glitching” phenomena. It has an operating voltage of 3 to 5 V, with a maximum voltage rating of 5.5 V (VCC - 0.5 V). Its maximum input current is -0.5 mA and the output current is 40 mA (0.4 mA if VCC = 5 V).

Application Fields of 74F86SJ

The 74F86SJ is a versatile IC, which can be used in many applications. It can be used atop printed circuit boards and in other factory automation and alarm systems. It is also employed in computerized data entry and remote control systems. The 74F86SJ is also frequently used in visual signalling systems, where it is used to detect and ignore any false triggering of the input signals.

Working Principle of 74F86SJ

The working principle of the 74F86SJ is relatively simple. The XOR gate looks for one, and only one, of the two inputs to be true in order to output a true output. Thus, the XOR gate can be used to detect an input change from zero to one, or one to zero. If both inputs are zero, the output will be zero. If both inputs are one, the output will be zero as well. This is due to the fact that the XOR gate only outputs a true result (i.e. one) when the inputs are different from each other. If the inputs are different (e.g. one is one and the other is zero), the output will be a true result (i.e. one). The XOR gate is ideal in circuits where noise and electrical spikes can cause random input signals, since it ignores any false triggering of the input signals and only pays attention to a genuine change in state. For example, in a visual signalling system, if an input changes rapidly from zero to one, then back to zero again, the XOR gate will detect the transition and output a positive result (i.e. one).

Conclusion

In conclusion, the 74F86SJ is a versatile IC designed for use in a variety of applications. It can detect and ignore any false triggering of the input signals due to its XOR gate implementation. Applications for the 74F86SJ include printed circuit boards, factory automation and alarm systems, computerized data entry systems, remote control systems and visual signalling systems. Finally, its built-in clamping diodes provide increased noise immunity and protection from electrical spikes and transients.

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