Schmitt Trigger: Supply Voltage 3.3V to 15V

Component Specifications

Definition

A Schmitt Trigger is an electronic comparator circuit with hysteresis implemented by applying positive feedback to the non-inverting input of an operational amplifier or comparator. It converts analog signals into clean digital outputs by using two different threshold voltages (upper and lower) to prevent false triggering from noise or signal bounce. Widely used in debounce circuits, waveform shaping, and level detection applications.

Working Principle

Operates using hysteresis: when input exceeds upper threshold (V_UT), output switches high; output remains high until input falls below lower threshold (V_LT), then switches low. This creates a 'dead band' that eliminates oscillations from noisy or slowly changing signals.

Materials

Semiconductor materials (silicon), copper traces, epoxy packaging, gold bonding wires

Technical Parameters

Parameter	Typical range	Notes & selection driver
Output Current	20mA max
Supply Voltage	3.3V to 15V
Input Impedance	>1MΩ
Propagation Delay	10ns to 100ns
Threshold Hysteresis	0.5V to 2V typical
Operating Temperature	-40°C to +85°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 60747, JEDEC JESD22

Parent Products

This component is used in the following industrial products

Debounce Circuit

An electronic circuit that eliminates contact bounce or signal noise from mechanical switches or digital inputs.

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Trigger Circuit

An electronic circuit that initiates or controls the timing of events in a larger system.

View Product Details

Engineering Analysis

Risks & Mitigation

Incorrect hysteresis setting causing false triggering
Power supply noise affecting threshold accuracy
Temperature drift changing threshold voltages

FMEA Triads

Trigger: Component aging or temperature variation
Failure: Threshold voltage drift beyond specification
Mitigation: Use temperature-compensated designs and periodic calibration

Trigger: Power supply instability
Failure: Inconsistent switching behavior
Mitigation: Implement power supply filtering and regulation

Trigger: Excessive input signal noise
Failure: Multiple unwanted output transitions
Mitigation: Increase hysteresis voltage and add input filtering

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±5% threshold voltage, ±10% hysteresis voltage

Test Method

Input sweep testing with oscilloscope measurement of V_UT and V_LT per IEC 60747 standards

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

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Inspection readiness

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Supplier transparency

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Manufacturers of Schmitt Trigger

Manufacturer profiles associated with Schmitt Trigger.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

Why is Schmitt Trigger used in debounce circuits?

Schmitt Trigger eliminates contact bounce in mechanical switches by requiring the signal to cross two different voltage thresholds before changing state, preventing multiple false triggers from a single physical switch press.

What is hysteresis voltage in Schmitt Trigger?

Hysteresis voltage is the difference between upper and lower threshold voltages. This voltage gap prevents output oscillation when input signal contains noise or slowly crosses the switching threshold.

Can Schmitt Trigger be used with analog signals?

Yes, Schmitt Trigger converts analog signals to digital outputs by comparing input voltage against threshold levels, making it useful for analog-to-digital interface applications.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Schmitt Trigger