C8051F526-C-IMR

Overview

The C8051F526-C-IMR is an automotive-grade, fully static 8-bit microcontroller based on the CIP-51 core. It features 2 kB of ISP Flash memory and 256 bytes of internal RAM. The device operates at up to 25 MHz with a supply voltage range of 2.0 V to 5.25 V. Key peripherals include a 12-bit ADC with programmable throughput up to 200 ksps, a comparator, and a built-in temperature sensor. Communication interfaces consist of hardware SPI and UART. The component is housed in a 10-pin DFN (3 x 3 mm) package and complies with AEC-Q100 standards for operation between -40°C and +125°C.

Feature Summary

• Automotive qualification compliant with AEC-Q100 specifications for high-temperature reliability
• Integrated 12-bit analog-to-digital converter with data-dependent windowed interrupt generation
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• Flexible port I/O architecture with push-pull or open-drain configurations and 5 V tolerance

Applications

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

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product selection guide to confirm package type and silicon revision. Confirm that the intended application aligns with the 'Not Recommended for New Designs' status indicated in official documentation. Ensure compatibility with existing toolchains and development kits before finalizing procurement decisions.

Selection Notes

Select this component when automotive qualification and robust peripheral integration are required within a compact form factor. The 10-pin DFN package suits space-constrained designs. Evaluate the 2 kB Flash capacity against application code size requirements. Consider the 25 MHz processing speed sufficient for real-time control loops involving the integrated ADC and communication interfaces.

Part Context

This part belongs to the C8051F52x/F53x family of mixed-signal microcontrollers from Silicon Labs. The family utilizes the CIP-51 architecture, offering enhanced performance over traditional 8051 cores. The C8051F526 variant specifically provides the lower end of the Flash memory spectrum within the series, targeting cost-sensitive applications requiring essential analog and digital peripherals.

Replacement Considerations

Silicon Labs recommends EFM8BB52F16I-QFN20 as a replacement for this obsolete component.