C8051F531A-IMR

Overview

The C8051F531A-IMR is an automotive-grade, 8-bit microcontroller from the C8051F52x/F53x family. It features a high-speed CIP-51 core operating at up to 25 MHz with 25 MIPS throughput. The device integrates 8 kB of ISP Flash memory and 256 bytes of internal data RAM. Key peripherals include a 12-bit ADC with programmable throughput up to 200 ksps, a LIN 2.1 controller, hardware SPI, and UART interfaces. It operates within a supply voltage range of 2.0 V to 5.25 V and supports an industrial temperature range of –40 °C to +125 °C.

Feature Summary

• Automotive qualified to AEC-Q100 standards for robust operation in demanding environments
• Integrated 12-bit analog-to-digital converter with data-dependent windowed interrupt generation
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• LIN 2.1 controller supporting both master and slave modes without requiring an external crystal

Applications

• Motor control systems
• Sensor interface circuits
• Parking assistance modules
• Seat position and adjustment controllers
• Fluid level monitoring applications

Procurement Notes

Verify the specific suffix 'IMR' corresponds to the tape-and-reel packaging variant when sourcing components. Confirm that the selected part number aligns with the required package type and quantity constraints for your manufacturing process. Ensure compatibility with existing design files before finalizing procurement orders.

Selection Notes

Select this component for designs requiring automotive reliability and integrated LIN communication capabilities. The 25 MHz processing speed suits applications needing efficient real-time control. Consider the available I/O pin count and peripheral set against system requirements to ensure optimal resource utilization within the constrained form factor.

Part Context

This microcontroller belongs to the C8051F52x/F53x series, which are highly integrated mixed-signal system-on-chip solutions. The family shares common architectural features, including the CIP-51 core and extensive analog peripherals. This specific model represents the 8 kB Flash variant within the automotive-qualified lineup.

Replacement Considerations

Check for end-of-life status or last-time buy notices associated with this specific revision. Evaluate alternative parts within the same Silicon Labs automotive portfolio that maintain pin-for-pin compatibility and equivalent peripheral sets for seamless integration upgrades.

FAQ

Does the C8051F531A-IMR support LIN bus communication?

Yes, it includes a dedicated LIN 2.1 controller capable of operating as both a master and a slave node without requiring an external crystal.

What is the maximum sampling rate of the onboard ADC?

The 12-bit ADC supports a programmable throughput of up to 200 ksps.