# NOR gate

Canonical URL: https://eloragrid.ai/symbols/logic-nor-gate
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: NOR
Drawing use: Schematic
Reference families: Manufacturer

A logic gate that inverts an inclusive-OR result.

## What it represents

A logic gate that inverts an inclusive-OR result.
On a schematic, identify the input truth convention and inverted output and trace the downstream logic and reset/permissive interface. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
NOR is different from NAND because the underlying input combination is OR rather than AND.
Terminal letters describe electrical roles, not package pin numbers. Check the selected public datasheet for the actual pin assignment, polarity and any internally connected terminals before completing the drawing.

## How to read it

- Identify the input truth convention and inverted output.
- Trace the downstream logic and reset/permissive interface.

## Information to show or reference

- Label the input truth convention and inverted output.
- Cross-reference the downstream logic and reset/permissive interface.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

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

## Facts

- Common schematic mnemonic: NOR — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: The input truth convention and inverted output
- Artwork scope: Original educational component glyph; not a certified standard graphic or package pinout.

## Public references

- [SN74HC02 — NOR gate logic](https://www.ti.com/lit/ds/symlink/sn74hc02.pdf) — Texas Instruments. Public primary manufacturer documentation establishes the component function or circuit/topology relationship. Preview geometry and drafting explanations are independently authored.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.