C8051F526A-IMR

Overview

The C8051F526A-IMR is an automotive and industrial microcontroller from Silicon Labs, part of the C8051F52x/F53x family. It features a high-speed 8051 core operating at up to 25 MIPS with a 25 MHz system clock. The device includes 2 kB of in-system programmable Flash memory and 256 bytes of internal data RAM. Key peripherals include a 12-bit ADC with 200 ksps throughput, two comparators, a LIN 2.1 controller, SPI, and UART interfaces. It operates on a supply voltage of 2.0 V to 5.25 V and is qualified to AEC-Q100 standards for temperatures ranging from -40 °C to +125 °C.

Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 specifications for robust operation in demanding environments.
• Integrated 12-bit analog-to-digital converter with programmable throughput and built-in temperature sensor capabilities.
• 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 adjustment controllers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package variant. Check for current lifecycle status as this series may be subject to obsolescence notices. Ensure environmental compliance documentation aligns with project requirements.

Selection Notes

Select this component when automotive reliability and high integration are required within a small form factor. Consider the limited 2 kB Flash and 256 bytes RAM for complex applications. Evaluate if the 25 MHz performance meets timing constraints. Verify pin compatibility with existing designs due to cross-series similarities.

Part Context

This MCU belongs to the C8051F52x/F53x family, designed for mixed-signal applications. It shares architectural similarities with the C8051F50x series but offers different memory configurations and peripheral sets. The device utilizes the CIP-51 core for enhanced instruction throughput compared to standard 8051 architectures.

Replacement Considerations

Silicon Labs recommends EFM8BB52F16I-QFN20 as a replacement for similar end-of-life parts in this category. Verify functional equivalence and pinout compatibility before substitution.

FAQ

Does the C8051F526A-IMR require an external crystal for LIN bus communication?

No, the integrated LIN 2.1 controller supports baud rate generation using the internal oscillator, eliminating the need for 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.