Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

NOR3

IEEE / ANSI

ANSI three-input NOR gate

The three-input NOR gate is the OR outline with three inputs and a bubble at the pointed output. The output is high only when all inputs are low. Triple three-input NOR packages provide the function and it is often used to create an all-clear signal.

Drawing use

Schematic

Application

Logic & signals

Reference family

IEEE / ANSI / Manufacturer

Form evidence

OR outline with three inputs and an output bubble. Distinctive-shape form as used in IEEE/ANSI-style schematics and manufacturer data books. Independent educational drawing; exact standard geometry and compliance are not asserted. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.

A distinction that matters

An AND outline with three bubbled inputs is the De Morgan equivalent of this gate.

Full referenceAdd to legend

NOR

Symbols

NOR gate

A logic gate that inverts an inclusive-OR result.

Drawing use

Schematic

Application

Logic & signals

Reference family

Manufacturer

A distinction that matters

NOR is different from NAND because the underlying input combination is OR rather than AND.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.