INDUSTRY COMPONENT

Compare Register

A digital logic component in timers/counters that compares stored values with input signals to trigger outputs.

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

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Compare Register.

compare register timer counter component digital comparator industrial automation PLC timing event triggering PWM control Compare Register in Machinery and Equipment Manufacturing

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

Interchangeable Parts

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

Buyer Feedback

★★★★☆ 4.6 / 5.0 (20 reviews)

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Compare Register meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Compare Register arrived with full certification."

"Great transparency on the Compare Register components. Essential for our Machinery and Equipment Manufacturing supply chain."

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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.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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