# Schmitt-trigger buffer

Canonical URL: https://eloragrid.ai/symbols/schmitt-trigger-buffer
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: SCHMITT
Drawing use: Schematic
Reference families: Manufacturer

A non-inverting digital element with separate rising and falling input thresholds.

## What it represents

A non-inverting digital element with separate rising and falling input thresholds.
On a schematic, identify the input signal and manufacturer hysteresis/threshold definition and trace the non-inverted digital output. Keep the component tag and signal/reference names consistent across the control drawing, terminal schedule and device documentation.
A Schmitt buffer preserves logical polarity, unlike a Schmitt-trigger inverter.
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 and manufacturer hysteresis/threshold definition.
- Trace the non-inverted digital output.

## Information to show or reference

- Label the input signal and manufacturer hysteresis/threshold definition.
- Cross-reference the non-inverted digital output.
- Add the selected device or circuit documentation revision, power/reference connections and project signal convention.

## Important distinction

A Schmitt buffer preserves logical polarity, unlike a Schmitt-trigger inverter.

## Facts

- Common schematic mnemonic: SCHMITT — descriptive only; project/device documentation defines reference designations.
- Terminal / interface focus: The input signal and manufacturer hysteresis/threshold definition
- Artwork scope: Original educational component glyph; not a certified standard graphic or package pinout.

## Public references

- [SN74LVC1G17 — non-inverting Schmitt buffers](https://www.ti.com/product/SN74LVC1G17) — 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.