C8051F546-IM

Overview

The C8051F546-IM is an automotive-grade, mixed-signal ISP Flash microcontroller from Silicon Labs. It features a high-speed 8051 core with up to 50 MIPS throughput at a 50 MHz clock frequency. The device includes 8 kB of in-system programmable Flash memory and 1280 bytes of internal data RAM. Key analog peripherals consist of a 12-bit ADC operating at up to 200 ksps with up to 25 external single-ended inputs, two comparators, and a built-in temperature sensor. Digital interfaces include LIN 2.1, UART, SMBus, and SPI. It operates on a supply voltage of 1.8 V to 5.25 V within a 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 ADC with high sampling rates and multiple input channels for precise signal acquisition.
• On-chip debug circuitry enables full-speed, non-intrusive in-system debugging without external emulators.
• Supports LIN 2.1 communication protocols for master and slave operations without requiring a crystal.

Applications

• Motor control systems
• Sensor interface circuits
• Parking assistance modules
• Seat position and adjustment controllers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific revision status, as this family is marked Not Recommended for New Designs. Ensure compatibility with existing design constraints regarding package dimensions and pinout configurations before finalizing procurement decisions.

Selection Notes

Select this MCU when automotive qualification and high integration are required in a small form factor. Consider the 8 kB Flash limit for complex firmware requirements. Evaluate the trade-off between the limited I/O count and the extensive peripheral set. Verify that the 1.8 V to 5.25 V supply range aligns with the system power architecture.

Part Context

This component belongs to the C8051F54x series of mixed-signal microcontrollers. It shares pin-for-pin compatibility with other devices in the C8051F54x, C8051F58x/59x, C8051F55x/56x/57x, and C8051F50x/1x families. This allows for flexible migration within the ecosystem while maintaining board layout consistency across different memory and I/O configurations.

Replacement Considerations

EFM8BB52F16I-QFN20

FAQ

Is the C8051F546-IM suitable for automotive applications?

Yes, it is qualified to AEC-Q100 standards and supports an extended temperature range of –40 °C to +125 °C.

What is the maximum sampling rate of the integrated ADC?

The 12-bit ADC supports a maximum sampling rate of 200 ksps.