C8051F543-IMR

Overview

The C8051F543-IMR is an automotive-grade, mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F54x family. It features a high-speed 8051 core operating at up to 50 MHz with 16 kB of in-system programmable Flash memory and 1280 bytes of internal data RAM. The device integrates a 12-bit ADC supporting up to 200 ksps conversion rates and includes two comparators. Communication interfaces include LIN 2.1, UART, SMBus, and SPI. It operates within a supply voltage range of 1.8 V to 5.25 V and supports an extended temperature range of –40 °C to +125 °C. The component is housed in a 24-pin QFN package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for robust industrial and automotive environments
• Integrated 12-bit analog-to-digital converter with high-speed sampling capabilities and built-in temperature sensor
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Hardware-enhanced serial communication peripherals including LIN 2.1 controller capable of master and slave operations

Applications

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

Procurement Notes

Verify that the specific suffix 'IMR' corresponds to the tape-and-reel packaging variant rather than tube packaging when sourcing components. Confirm the revision status as the datasheet indicates this family is not recommended for new designs. Ensure compatibility with existing PCB footprints for the 24-pin QFN package during procurement planning.

Selection Notes

Select this component when automotive reliability under extreme temperatures is required alongside integrated analog signal processing. The inclusion of a hardware LIN controller simplifies network integration compared to software-only implementations. Consider the pin count and peripheral set against alternative members of the C8051F54x series if different memory sizes or I/O configurations are needed.

Part Context

This microcontroller belongs to the C8051F54x series, which provides pin-for-pin compatibility with other devices in the C8051F58x, C8051F59x, C8051F55x, C8051F56x, C8051F57x, C8051F50x, and C8051F51x families. This compatibility allows for design flexibility and potential migration paths within the same package constraints while maintaining identical physical footprint requirements.

Replacement Considerations

Silicon Labs recommends EFM8BB52F16I-QFN20 as a replacement for this end-of-life part.