C8051F533-C-IM

Overview

The C8051F533-C-IM is an automotive-grade, fully static 8-bit microcontroller based on the CIP-51 core. It features 4 kB of ISP Flash memory and 256 bytes of internal data RAM. The device operates at a maximum system clock frequency of 25 MHz, delivering up to 25 MIPS throughput. It supports a supply voltage range from 2.0 V to 5.25 V and includes a built-in LDO regulator. Key peripherals include a 12-bit ADC with programmable throughput up to 200 ksps, a hardware SPI interface, a UART serial port, and a LIN 2.1 controller. The component is housed in a 20-pin TSSOP package.

Feature Summary

• Automotive qualified to AEC-Q100 standards with extended temperature operation up to +125 °C
• 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
• Hardware support for LIN 2.1 communication protocols allowing master and slave operation without a crystal

Applications

• Automotive sensor interfaces and monitoring systems
• Industrial control applications requiring robust peripheral sets
• LIN bus network nodes in vehicle communication architectures
• Motor control and fluid level monitoring systems

Procurement Notes

Verify the specific suffix 'C' indicates the commercial temperature grade variant within the automotive-qualified family. Confirm the package type matches the required PCB footprint, as this part number specifies the TSSOP-20 configuration. Check current lifecycle status, as documentation marks this family as not recommended for new designs. Ensure compatibility with existing design tools and development kits before finalizing procurement decisions.

Selection Notes

Select this component when designing systems that require automotive qualification alongside legacy 8051 compatibility. It is suitable for applications needing moderate processing speed with integrated analog capabilities like temperature sensing. Consider the limited RAM size for complex algorithm implementation. Evaluate if the available I/O count meets the system requirements given the shared pin functions in the 20-pin package.

Part Context

This microcontroller belongs to the C8051F52x/F53x family, which combines high-performance mixed-signal capabilities with the standard 8051 instruction set. The series is designed for cost-sensitive embedded applications requiring high integration. It utilizes Silicon Labs' CIP-51 architecture to improve instruction execution efficiency compared to traditional 8051 cores while maintaining software compatibility.

Replacement Considerations

Silicon Laboratories recommends the EFM8BB52F16I-QFN20 as a replacement for this end-of-life part. Developers should evaluate the architectural differences between the C8051F and EFM8 families during migration.