One-bit full adder on unusual microcircuits

We are accustomed to 14-pin and 16-pin microcircuits containing several logical elements or a whole node — a counter, a decoder, an ALU, etc. But before there were also micro-assemblies and microcircuits in which only one logical element was placed. After a long oblivion, they returned in the form of five-pin SMD components. For example, 74LVC1G86 is exclusive OR, 74LVC1G08 - AND, 74LVC1G32 - OR. The proposed one-bit full adder was made on them.

His scheme:
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It does not show 220 ohm resistors, LEDs indicating the status of all inputs and outputs, 0.1 μF capacitors in parallel with the power supply. On the board for them seats are provided. Files: gerberas , source in Eagle format , schematic in PDF .

The input data for the full adder are two single-bit numbers and the transfer signal from the previous same adder, the output is one single-bit number and the transfer signal to the next same adder. Since there are three input signals, there may be eight combinations. The truth table of the device is replicated on many sites , where its various variants differ from each other only in their design.

The device board is made so that you can solder pins to it for installation on the breadboard. There you can also place switches for supplying input signals:



But it is more interesting to make several boards:



By installing them on the breadboard and connecting the inputs and outputs of the transfer of adjacent adders, you get a multi-bit full adder, which can then become part of the ALU.