Is it possible to configure a wired OR circuit by connecting output terminals in general-purpose logic ICs?

Fig. 1 Example of wire OR circuit by a buffer using open-drain output
Fig. 1 Example of wire OR circuit by a buffer using open-drain output

A wired OR circuit can be configured by using a buffer with an open-drain output (74HC07, etc.). (Fig. 1)

Fig. 2 Example of wire OR circuit by a buffer using three-state output Conflict of three-state outputs
Fig. 2 Example of wire OR circuit by a buffer using three-state output Conflict of three-state outputs

It is also possible to configure wired-OR with products with 3-state output buffers (74VHC126, etc.). The A and B terminals can be fixed to low (L), and wired OR can be configured using the G1 and G2 terminals and an external pull-up resistor.

Related Links

The following documents also contain related information.

Product Lists

FAQs

Application Notes

Product page General Purpose Logic ICs
Products
e-Learning Basics of CMOS Logic ICs
e-Learning
e-Learning Usage Considerations of CMOS Logic ICs
e-Learning

Back to FAQs of General-Purpose Logic ICs

開啟新視窗