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

S̄R̄

IEEE / ANSI

ANSI cross-coupled NAND latch

Drawing the latch as two cross-coupled NAND gates shows its construction explicitly. A low on the set input forces Q high; a low on the reset input forces the complement high. With both inputs high the latch holds. Both inputs low drives both outputs high, which is normally treated as invalid.

Drawing use: Schematic
Application: Logic & signals
Reference family: IEEE / ANSI / Manufacturer
Form evidence: Two NAND outlines with each output fed back to the other gate's input. 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

The cross-coupled NOR latch has active-high inputs.

Full reference

SR-LATCH

Symbols

Set-reset latch

Retains a digital state that is changed by the defined set or reset input conditions.

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

A distinction that matters

Active-high and active-low SR implementations have different input conventions; a bare SR label does not resolve simultaneous-input behaviour.

Full reference

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