Side-by-side reference

Understand the difference.

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

First referenceCompare with

NAND-ST

IEEE / ANSI

ANSI Schmitt-trigger NAND gate

A Schmitt-trigger NAND is drawn as a normal NAND outline with the hysteresis mark inside the body. Each input switches at different rising and falling thresholds, so the gate accepts slow or noisy signals while still performing the NAND function.

Drawing use: Schematic
Application: Logic & signals
Reference family: IEEE / ANSI / Manufacturer
Form evidence: NAND outline containing the hysteresis mark. 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.

A distinction that matters

A standard NAND has no hysteresis mark and a single threshold.

Full reference

NAND

Symbols

NAND gate

A logic gate that inverts the result of an AND operation.

Drawing use: Schematic
Application: Logic & signals
Reference family: Manufacturer

A distinction that matters

The inversion bubble concerns logical polarity; it does not identify a normally-closed physical contact.

Full reference

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