# OR gate

Canonical URL: https://eloragrid.ai/symbols/logic-or-gate
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: OR
Drawing use: Schematic
Reference families: Manufacturer

A positive-logic element whose output is true when at least one input is true.

## What it represents

A positive-logic element whose output is true when at least one input is true.
On a schematic, identify the input signal meanings and the inclusive-OR convention and trace the combined permissive or alarm output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
Inclusive OR differs from XOR: OR remains true when both inputs are true.
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 signal meanings and the inclusive-OR convention.
- Trace the combined permissive or alarm output.

## Information to show or reference

- Label the input signal meanings and the inclusive-OR convention.
- Cross-reference the combined permissive or alarm output.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

Inclusive OR differs from XOR: OR remains true when both inputs are true.

## Facts

- Common schematic mnemonic: OR — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: The input signal meanings and the inclusive-OR convention
- Artwork scope: Original educational component glyph; not a certified standard graphic or package pinout.

## Public references

- [SN74HC32 — OR gate logic](https://www.ti.com/lit/ds/symlink/sn74hc32.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.