Digital Logic Fundamentals Unit 7 – Tri-State Output
The output of a tri-state device can source or sink current. When the output is high, the tri-state
device is a source of current. When the output is low, the tri-state device is a sink for current.
When the tri-state device is in the high-Z state, the output does not source or sink output current;
the output current is zero.
The following devices can have tri-state logic:
- BUFFERS
- INVERTERS
- FLIP-FLOPS
- REGISTERS
- ALMOST ALL MICROPROCESSOR ICs.