Can I short circuit the outputs of general-purpose CMOS logic to use them?

Wired OR logical composition where both outputs are connected cannot be used because the output becomes short circuited. Of course, do not connect output to VCC nor GND.

To improve the driving capacity, gates in the same package can be connected as shown in the following figure.

It is recommended that high driving capacity ICs such as 74AC,74LCX,74VCX series are used.

[Figure: Example of prohibited wired OR and improved driving capacity]

To Top

A new window will open.