MC74HC86AFELG

Current - Output High, Low:	5.2mA, 5.2mA
Base Part Number:	74HC86
Package / Case:	14-SOIC (0.209", 5.30mm Width)
Supplier Device Package:	SOEIAJ-14
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 125°C
Max Propagation Delay @ V, Max CL:	17ns @ 6V, 50pF
Logic Level - High:	1.5 V ~ 4.2 V
Logic Level - Low:	0.5 V ~ 1.8 V
Series:	74HC
Current - Quiescent (Max):	1µA
Voltage - Supply:	2 V ~ 6 V
Features:	--
Number of Inputs:	2
Number of Circuits:	4
Logic Type:	XOR (Exclusive OR)
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Logic - Gates and Inverters

The MC74HC86AFELG is an integrated circuit with a 4-bit binary full adder constructed with MOS technology. Comprised of four inverters, two NAND gates, and a 4-bit look-ahead carry generator, the adder is able to effectively combine two 4-bit binary numbers to generate their sum. It is designed to be used in high speed applications, as it is able to add two reasonably large binary numbers in a single clock cycle. The MC74HC86AFELG is often used in digital applications. For example, it is used in binary counters, arithmetic circuits, and other applications where addition of two numbers is required. It is also used in amplification circuits and frequency dividers, as well as to combine bits together to form parallel words.In terms of its working principle, the MC74HC86AFELG uses an internal look-ahead carry generator to perform its function of adding two 4-bit binary words. The look-ahead carry generator is able to detect the possibility of a carry from a half-adder before the next half-adder is added. This allows the half adder to add the two inputs to generate the sum before the carry is propagated through the other half adders. This greatly reduces the complexity of the circuit and provides a major speed boost, as it allows the adder to be operated in a single clock cycle. The four inverters form the two input bolts for the NAND gates, which generate the Sum output. The Sum and Carry outputs are fed forward to the next stage of half adders, and the carry is added to the inputs of the half-adder. This is repeated until the entire 4-bit word is processed and the result is generated. The MC74HC86AFELG has several advantages over other adder circuits. It is relatively inexpensive, and its low power consumption makes it ideal for battery powered applications. Furthermore, it is able to take two 4-bit words of data and add them together in a single clock cycle, thus providing a major speed increase compared to other full adder circuits. Overall, the MC74HC86AFELG is an excellent choice for applications where addition of two binary numbers is required. Its look-ahead carry generator allows for a simple and effective full adder operation in a single clock cycle, and its small size and low power consumption make it ideal for battery powered and small form factor designs.

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