CRC Generator/Checker Component for MAC Controllers

Product Specifications

Technical details and manufacturing context for CRC Generator/Checker

Definition

The CRC Generator/Checker is an essential sub-component of the MAC (Media Access Control) Controller in network interface hardware. It performs error detection by calculating CRC codes for outgoing data frames and verifying CRC codes for incoming frames, ensuring data integrity during transmission over physical network media. This component is implemented using polynomial division algorithms, typically with linear feedback shift registers, to compute fixed-length check values based on the data bits. For transmission, it generates CRC codes that are appended to data frames; for reception, it recalculates the CRC from received data and compares it with the transmitted CRC to detect errors. The component is configurable to support data widths from 8 to 64 bits, CRC widths from 8 to 32 bits, and operating frequencies from 10 to 500 MHz. It operates with supply voltages from 1.8 to 3.3 V, consumes 10 to 100 mW at maximum frequency, and has a latency of 1 to 10 clock cycles depending on data width and pipeline. Throughput ranges from 1 to 100 Gbps. The component is available in package types from QFN-32 to QFP-144, with ESD tolerance from 2000 to 8000 V (HBM model). It is designed for industrial temperature ranges from -40 to 85 °C, per IEC 60068-2-14. The polynomial for CRC-32, as per IEEE 802.3, is 0x04C11DB7. The component is fabricated on silicon semiconductor material. These specifications are reference ranges; actual values must be confirmed with the legal manufacturer or supplier for the specific model and application.

Working Principle

The CRC Generator/Checker computes a fixed-length checksum using polynomial division. For outgoing data, it appends the CRC to the frame; for incoming data, it recalculates the CRC and compares it to the received value. If they differ, an error is flagged. The implementation uses linear feedback shift registers to perform the division efficiently. The component supports configurable data widths, CRC widths, and operating frequencies to match the bus and network requirements.

Common Materials

Silicon semiconductor

Technical Parameters

Parameter	Typical range	Notes & selection driver
Data Width	8–64 bit	Configurable to match bus width
Polynomial	0x04C11DB7	CRC-32 standard for EthernetIEEE 802.3
CRC Width	8–32 bit	Selectable CRC-8/16/32
Operating Frequency	10–500 MHz	Higher for gigabit Ethernet
Supply Voltage	1.8–3.3 V	Core and I/O voltage domains
Power Consumption	10–100 mW	At max frequency
Operating Temperature	-40–85 °C	Industrial gradeIEC 60068-2-14
Latency	1–10 clock cycles	Depends on data width and pipeline
Throughput	1–100 Gbps	Sustained data rate
Package Type	QFN-32–QFP-144	Depends on pin countJEDEC MS-026
ESD Tolerance	2000–8000 V	HBM modelIEC 61000-4-2

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

Components / BOM

Linear Feedback Shift Register Part
Core computational element that performs polynomial division for CRC generation

Material: silicon
Control Logic
Manages data flow, initialization, and CRC verification operations

Material: silicon
Data Interface
Connects to MAC Controller data path for sending/receiving data and CRC values

Material: metal interconnects

Application & selection

Application Fit & Sizing Matrix

Operational Limits

voltage:	1.8V to 3.3V
temperature:	-40°C to +85°C
clock frequency:	Up to 200 MHz

Media Compatibility

✓ Ethernet frames ✓ Serial data streams ✓ Packetized network data

Unsuitable: High-radiation environments (e.g., space applications without shielding)

Sizing Data Required

Data bus width (e.g., 8, 16, 32 bits)
CRC polynomial (e.g., CRC-32, CRC-16-CCITT)
Maximum data throughput requirement (Mbps)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Data Corruption

Cause: Bit errors in the CRC calculation due to electrical noise, signal degradation, or component aging in the generator/checker circuit, leading to incorrect CRC generation or validation.

Circuit Failure

Cause: Overheating or voltage spikes damaging integrated circuits (ICs) or logic gates in the CRC hardware, often from poor thermal management, power supply issues, or electrostatic discharge (ESD).

Maintenance Indicators

Frequent data transmission errors or CRC mismatch alerts in system logs, indicating the checker is flagging valid data or the generator is producing inconsistent codes.
Unusual heat emission or burnt odor from the CRC circuit board, suggesting overheating components that could lead to imminent failure.

Engineering Tips

Implement regular signal integrity testing and environmental monitoring (e.g., temperature, humidity) around the CRC circuitry to preempt noise-induced errors and thermal stress.
Use redundant CRC modules in parallel with periodic self-test routines to cross-verify outputs, ensuring early detection of degradation without interrupting data flow.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ANSI/ASQ Z1.4-2003 Sampling Procedures and Tables for Inspection by Attributes DIN EN ISO 13849-1 Safety of machinery - Safety-related parts of control systems

Quoted from the published standard.

Manufacturing Precision

Electrical tolerance: +/-5% for CRC polynomial coefficients
Timing tolerance: Clock frequency stability +/-0.1%

Quality Inspection

Bit Error Rate Test (BERT) for CRC accuracy verification
Environmental stress testing (temperature/humidity/vibration)

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.

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Manufacturers of CRC Generator/Checker

Manufacturer profiles associated with CRC Generator/Checker.

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Frequently Asked Questions

What is the function of the CRC Generator/Checker?

It generates CRC codes for outgoing data frames and verifies CRC codes for incoming frames, ensuring data integrity during network transmission.

What are the typical data width and CRC width ranges?

Data width is configurable from 8 to 64 bits, and CRC width is selectable from 8 to 32 bits, depending on the application.

What standards are referenced for the CRC polynomial?

The CRC-32 polynomial for Ethernet is 0x04C11DB7, as per IEEE 802.3. Other polynomials may be used for different CRC widths.

How should I verify the specifications for my application?

The listed values are reference ranges. You must confirm the exact specifications, including operating frequency, power consumption, and package, with the legal manufacturer or supplier for your specific model.

Related equipment

Applied To / Applications

This component is essential for the following industrial systems and equipment:

MAC Controller

View system integration details

MAC (Media Access Control) Controller

View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems

Downstream Applications

Specialized Tooling

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for CRC Generator/Checker.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

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 · Page last updated 12 October 2026

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