Alternatives To Three-state Bus
A three-state bus is typically used between chips on a single printed circuit board (PCB), or sometimes between PCBs plugged into a common backplane.
Usage of three-state logic is not recommended for on-chip connections but rather for inter-chip connections.
Three-state buffers used to enable multiple devices to communicate on a data bus can be functionally replaced by a multiplexer. That will help select output from a range of devices and write one to the bus.
Read more about this topic: Three-state Logic
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