C8051F534A-IMR

Overview

The C8051F534A-IMR is an automotive-grade, highly integrated mixed-signal System-on-Chip microcontroller from Silicon Labs. It features a high-speed 8051 core operating at up to 25 MHz with 25 MIPS throughput. The device includes 8 kB of in-system programmable Flash memory and 256 bytes of internal RAM. Key peripherals include a 12-bit ADC with up to 200 ksps throughput, two comparators, a temperature sensor, hardware SPI, UART, and a LIN 2.1 controller. It operates on a supply voltage of 2.0 V to 5.25 V and supports an industrial temperature range of -40°C to +125°C.

Feature Summary

• Automotive qualified to AEC-Q100 standards for robust operation in demanding environments.
• Integrated 12-bit analog-to-digital converter with programmable throughput and windowed interrupt capabilities.
• Supports LIN 2.1 communication protocols without requiring an external crystal.
• Features non-intrusive on-chip debug circuitry for full-speed in-system development.

Applications

• Automotive body control modules
• Industrial sensor interface systems
• LIN bus network nodes
• Portable instrumentation

Procurement Notes

Verify the specific suffix 'IMR' corresponds to the tape-and-reel packaging variant required for automated assembly processes. Confirm that the silicon revision matches the design requirements, as the datasheet indicates this family is not recommended for new designs. Ensure compatibility with existing firmware architectures before procurement due to potential end-of-life status.

Selection Notes

Select this component when automotive qualification and LIN support are mandatory within a constrained pin count. The 8 kB Flash size suits applications with moderate code complexity. Consider the 256-byte RAM limitation for data-intensive tasks. Evaluate if the 25 MHz clock speed meets real-time processing needs compared to higher-performance alternatives in the portfolio.

Part Context

This part belongs to the C8051F52x/F53x family of mixed-signal microcontrollers. These devices are designed for applications requiring high integration in small packages. The family shares common peripheral sets including the CIP-51 core and analog blocks, differing primarily in memory sizes and I/O counts. This specific model represents the 8 kB Flash variant in a 20-pin TSSOP package.

Replacement Considerations

Silicon Labs recommends EFM8BB52F16I-QFN20 as a replacement. Verify pinout compatibility and software migration efforts when transitioning to the newer EFM8 Busy Bee series.