C8051F544-IMR

Overview

The C8051F544-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, two comparators, and multiple digital communication interfaces including LIN 2.1, UART, SMBus, and SPI. Designed for constrained spaces, it utilizes a 32-pin QFN package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for robust industrial and automotive environments.
• Integrated on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Supports flexible clock source switching between internal oscillators and external crystals or RC circuits for power optimization.

Applications

• Motor control systems requiring precise timing and analog feedback
• Sensor interface modules utilizing high-resolution ADC capabilities
• LIN bus network nodes in automotive body electronics

Procurement Notes

Verify component authenticity through authorized distributors as this part is designated Not Recommended for New Designs. Confirm package integrity upon receipt, specifically checking for lead coplanarity on the QFN substrate. Ensure ESD precautions are strictly followed during handling due to the exposed thermal pad design. Cross-reference datasheet revisions to ensure compatibility with existing firmware development tools.

Selection Notes

Select this component when automotive reliability and small form factor integration are prioritized over new design recommendations. It serves as a suitable replacement for legacy C8051 designs requiring LIN connectivity and high-speed analog conversion. Evaluate pin compatibility with the C8051F58x/59x series if migrating from larger packages. Consider the end-of-life status when planning long-term production lifecycles.

Part Context

This MCU belongs to the C8051F54x series, which offers pin-for-pin compatibility with the C8051F55x/56x/57x and C8051F58x/59x families. The series is characterized by its stand-alone system-on-a-chip architecture, integrating voltage regulators, watchdog timers, and clock multipliers. It targets applications demanding significant performance density within limited board space constraints.

Replacement Considerations

Silicon Labs recommends the EFM8BB52F16I-QFN20 as a modern alternative for new designs. Verify functional equivalence regarding peripheral availability and instruction set compatibility before transitioning projects away from the C8051F54x family.

FAQ

Does the C8051F544-IMR support LIN 2.1 communication?

Yes, the device includes a hardware-enhanced LIN 2.1 controller capable of operating in both master and slave modes without requiring an external crystal.

What is the maximum sampling rate of the integrated ADC?

The 12-bit ADC supports a maximum sampling rate of up to 200 ksps with selectable gain and configurable window detection features.