C8051F533A-IM

Overview

The C8051F533A-IM is an automotive-grade 8-bit microcontroller from Silicon Labs, featuring a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz system clock. It integrates 4 kB of in-system programmable Flash memory and 256 bytes of internal data RAM. The device includes a 12-bit ADC with programmable throughput up to 200 ksps, a programmable comparator, and a built-in temperature sensor. Communication interfaces include hardware SPI and UART, along with a LIN 2.1 controller. It operates on a supply voltage of 2.0 to 5.25 V and supports an operating temperature range of –40 to +125 °C.

Feature Summary

• Automotive qualified to AEC-Q100 standards for robust operation in demanding environments
• High-precision 24.5 MHz internal oscillator with ±0.5% accuracy supporting UART and LIN-Master operation
• Integrated 12-bit ADC with data-dependent windowed interrupt generator and built-in temperature sensor
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators

Applications

• Automotive body control modules
• Industrial sensor interface systems
• LIN bus communication nodes
• Temperature monitoring applications

Procurement Notes

Verify the specific suffix 'IM' corresponds to the 20-pin QFN package when sourcing. Confirm that the component meets AEC-Q100 requirements if used in automotive designs. Check current availability status as this family may be subject to end-of-life notices or replacement recommendations by the manufacturer.

Selection Notes

Select this model for applications requiring automotive qualification and high integration in a small form factor. Ensure the 4 kB Flash and 256 B RAM meet code and data storage needs. Verify that the 20-pin package fits the PCB layout constraints. Consider the 25 MHz clock speed sufficient for real-time processing requirements.

Part Context

This part belongs to the C8051F52x/F53x family of highly integrated automotive and industrial MCUs. These devices are designed as standalone system-on-a-chip solutions, combining analog peripherals, digital I/O, and communication interfaces. The family emphasizes low power consumption and flexibility through software-configurable peripherals.

Replacement Considerations

Silicon Laboratories recommends EFM8BB52F16I-QFN20 as a replacement for this part due to end-of-life status.