C8051F544-IQR

Overview

The C8051F544-IQR is an automotive-grade, mixed-signal ISP Flash MCU from the Silicon Labs C8051F54x family. It features a high-speed 8051 core with up to 50 MIPS throughput at a 50 MHz clock frequency. The device integrates 16 kB of in-system programmable Flash memory and 1280 bytes of internal data RAM (256 + 1024 XRAM). Key analog peripherals include a 12-bit ADC supporting up to 200 ksps with up to 25 external single-ended inputs, two comparators, and a built-in temperature sensor. Digital interfaces comprise LIN 2.1, UART, SMBus, SPI, four 16-bit timers, and a 16-bit PCA with six capture/compare modules. It operates on a supply voltage of 1.8 V to 5.25 V and is qualified to AEC-Q100 standards for operation between –40 °C and +125 °C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 specifications for robust industrial and automotive environments.
• Integrated 12-bit ADC with high sampling rates and multiple input channels for precise signal acquisition.
• Hardware-accelerated communication protocols including LIN 2.1 controller without requiring external crystals.
• Full-speed non-intrusive in-system debug capabilities via on-chip debug circuitry.

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific ordering suffix matches the required package type and temperature grade. Check current lifecycle status as this series may be subject to discontinuation notices. Ensure compatibility with existing design tools and development kits before finalizing procurement decisions.

Selection Notes

Select this model when automotive reliability and high integration are required within constrained space. Consider the 32-pin QFN/QFP package availability for pin-compatible upgrades from other C8051F54x variants. Evaluate the need for LIN 2.1 support versus standard UART/SPI requirements. Assess power consumption profiles against typical operating currents at maximum clock speeds.

Part Context

This microcontroller belongs to the C8051F54x family, which offers pin-for-pin compatibility with the C8051F58x/59x, C8051F55x/56x/57x, and C8051F50x/1x series. It serves as a standalone system-on-a-chip solution featuring on-chip voltage regulators, power-on resets, watchdog timers, and clock oscillators. The architecture supports field upgrades through in-circuit reprogrammable Flash memory.

Replacement Considerations

EFM8BB52F16I-QFN20 is recommended as a replacement part number for this component.

FAQ

Does the C8051F544-IQR require an external crystal for LIN 2.1 operation?

No, the device includes an internal 24 MHz oscillator with ±0.5% accuracy that enables master LIN operation without a 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.