Understand the difference.
Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.
OC-BUF
SymbolsOpen-collector buffer
Provides a logic output through a transistor pull-down stage requiring the documented external load or pull-up.
- Drawing use
- Schematic
- Application
- Logic & signals
- Reference family
- Manufacturer
A distinction that matters
An open collector can sink current under its limits; it does not actively drive the high state like a push-pull output.
3STATE
SymbolsThree-state logic buffer
A digital output stage that can drive logical states or enter its documented high-impedance state.
- Drawing use
- Schematic
- Application
- Logic & signals
- Reference family
- Manufacturer
A distinction that matters
High impedance differs from driving logical zero; disabled outputs still have device-specific leakage and voltage limits.
Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.