Understand the difference.

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

NOR

IEEE / ANSI

ANSI NOR gate drawn as negative-input AND

A NOR gate is equivalent to an AND gate with inverted inputs. Drawing the AND outline with input bubbles states the design intent directly: the output is high only when all inputs are low. It is the same device as a NOR gate with the outline chosen to match the signal sense.

Drawing use

Schematic

Application

Logic & signals

Reference family

IEEE / ANSI / Manufacturer

Form evidence

AND outline with input bubbles (De Morgan equivalent of NOR). 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 only an output bubble is a NAND; here the bubbles are on the inputs.

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.