CRC Check Unit for Frame Handlers | Data Integrity Verification

Product Specifications

Technical details and manufacturing context for CRC Check Unit

Definition

The CRC Check Unit is an essential component of the Frame Handler system responsible for implementing error-detection algorithms. It calculates CRC values for data frames before transmission and verifies received frames against their CRC codes to detect any corruption or errors that may have occurred during data transfer. This unit ensures reliable communication by identifying corrupted frames that need to be retransmitted or discarded. The unit operates by treating data frames as binary polynomials, dividing the data polynomial by a predetermined generator polynomial using modulo-2 arithmetic, and producing a remainder that becomes the CRC code. During transmission, this CRC is appended to the data frame. Upon reception, the unit recalculates the CRC using the received data and compares it with the transmitted CRC value. A mismatch indicates data corruption. The unit supports standard Ethernet speeds from 10 to 1000 Mbps per IEEE 802.3, configurable CRC widths from 8 to 32 bits per ISO 3309, and operates in industrial temperature ranges from -40 to 85°C per IEC 60068-2-1. It is designed for logic-level compatibility with supply voltages of 3.3 to 5.0 V DC, and power consumption ranges from 0.5 to 2.0 W depending on data rate. Latency per frame processing is 1 to 10 ns. For CRC-32, error detection capability is 99.99%. Interface types include parallel or serial, with widths from 8 to 32 bits. The unit is available in a QFN-48 surface-mount package per JEDEC MS-026, and operates in non-condensing humidity from 5% to 95% RH per IEC 60068-2-78. The chip-only weight is 2 to 5 g. Materials on file include semiconductor silicon, copper traces, and plastic encapsulation. These specifications are directory reference ranges; verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

The CRC Check Unit operates by treating data frames as binary polynomials. It divides the data polynomial by a predetermined generator polynomial using modulo-2 arithmetic, producing a remainder that becomes the CRC code. During transmission, this CRC is appended to the data frame. Upon reception, the unit recalculates the CRC using the received data and compares it with the transmitted CRC value. A mismatch indicates data corruption.

Common Materials

Semiconductor silicon, Copper traces, Plastic encapsulation

Technical Parameters

Parameter	Typical range	Notes & selection driver
Data Rate	10–1000 Mbps	Supports standard Ethernet speedsIEEE 802.3
CRC Width	8–32 bit	Configurable polynomial widthISO 3309
Operating Temperature	-40–85 °C	Industrial gradeIEC 60068-2-1
Supply Voltage	3.3–5.0 V DC	Logic level compatibility
Power Consumption	0.5–2.0 W	Depends on data rate
Latency	1–10 ns	Per frame processing
Error Detection Capability	99.99 %	For CRC-32
Interface Type	8–32 bit	Parallel or serial
Package Type	QFN-48	Surface mountJEDEC MS-026
Operating Humidity	5–95 %RH	Non-condensingIEC 60068-2-78
Weight	2–5 g	Chip only

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

CRC Calculation Engine Part
Performs the polynomial division and remainder calculation for CRC generation and verification

Material: Semiconductor logic gates
Data Buffer
Temporarily stores incoming/outgoing data frames during CRC processing

Material: SRAM cells
Control Logic
Manages the timing and sequencing of CRC operations

Material: Semiconductor logic gates
Generator Polynomial
The predetermined polynomial the frame data is divided by to produce the CRC.

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for CRC Check Unit.

Applied To / Applications

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

Frame Handler

View system integration details

Manufacturers of CRC Check Unit

Manufacturer profiles associated with CRC Check Unit.

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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 · Page last updated 16 September 2026

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Frequently Asked Questions

What is the primary function of the CRC Check Unit?

The CRC Check Unit calculates and verifies Cyclic Redundancy Check (CRC) codes for data frames in a Frame Handler. It appends a CRC to outgoing frames and checks incoming frames to detect corruption, ensuring data integrity.

What data rates does the CRC Check Unit support?

According to the directory reference, it supports standard Ethernet speeds from 10 to 1000 Mbps per IEEE 802.3. Actual supported rates may vary by model; confirm with the manufacturer.

How does the CRC Check Unit detect errors?

It treats data as a binary polynomial, divides by a generator polynomial using modulo-2 arithmetic, and appends the remainder as CRC. On reception, it recalculates and compares; a mismatch indicates corruption.

What are the operating temperature and humidity ranges?

The directory lists an operating temperature of -40 to 85°C per IEC 60068-2-1 and non-condensing humidity of 5% to 95% RH per IEC 60068-2-78. Verify these for the specific model.

Data Basis

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

Preliminary Technical Classification

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pressure:	N/A (electronic component, not fluid handling)
other spec:	Data rate: Up to 10 Gbps, Power consumption: <5W typical, Operating voltage: 3.3V ±10%, Humidity: 5-95% non-condensing
temperature:	-40°C to +85°C (industrial grade), -20°C to +70°C (commercial grade)

CRC Check Unit

Product Specifications

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