Compare Register: Temperature Range -40°C to +85°C

Component Specifications

Definition

A compare register is a specialized digital storage element within timer/counter modules that holds a predefined reference value. It continuously compares this stored value against the current count from the timer/counter's accumulator. When the count matches or exceeds the reference value, it generates an output signal or interrupt, enabling precise timing control, event triggering, or pulse-width modulation in industrial automation systems.

Working Principle

The compare register operates by storing a user-defined threshold value. The timer/counter's accumulator increments or decrements based on clock pulses or external events. A digital comparator circuit continuously monitors the accumulator value against the stored compare value. When equality or a defined relational condition (e.g., greater than or equal to) is met, it sets a flag or triggers an output signal, which can reset the timer, generate interrupts, or control external devices.

Materials

Semiconductor materials (silicon, gallium arsenide) with integrated circuits; substrate: FR-4 epoxy laminate; contacts: gold-plated copper alloy; encapsulation: epoxy resin or ceramic package.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bit Width	8-bit to 32-bit
Output Type	Digital (TTL/CMOS)
Clock Frequency	Up to 100 MHz
Comparison Modes	Equality, Greater Than, Less Than
Operating Voltage	3.3V to 5V DC
Temperature Range	-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

ISO 13849-1, IEC 61131-3, DIN EN 61131

Parent Products

This component is used in the following industrial products

Timer/Counter

An electronic component that measures and controls time intervals or counts events within a timing circuit.

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Engineering Analysis

Risks & Mitigation

Electrical overstress damaging semiconductor components
Timing inaccuracies due to clock signal jitter
Software misconfiguration causing unintended triggers
Electromagnetic interference affecting signal integrity

FMEA Triads

Trigger: Voltage spikes or electrostatic discharge
Failure: Permanent damage to integrated circuits, leading to no output
Mitigation: Implement surge protection circuits and proper grounding

Trigger: Software bug setting incorrect compare values
Failure: Premature or delayed triggering, disrupting process timing
Mitigation: Add range checks in firmware and use watchdog timers

Trigger: Clock signal instability from poor PCB layout
Failure: Inconsistent comparison results, causing erratic machine behavior
Mitigation: Follow high-frequency design guidelines and use shielded cables

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.01% of timing accuracy under specified temperature and voltage ranges

Test Method

Functional testing with signal generators and oscilloscopes to verify trigger points and output signals under load conditions

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

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Compare Register

Manufacturer profiles associated with Compare Register.

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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

What is the primary function of a compare register in a timer/counter?

It compares a stored reference value with the timer's current count to trigger outputs or interrupts at precise moments, used for timing events, generating waveforms, or controlling processes.

How does a compare register differ from a capture register?

A compare register outputs a signal when the timer count matches a preset value, while a capture register records the timer count when an external event occurs, storing it for later use.

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.

Compare Register