C8051F531A-ITR

Overview

The C8051F531A-ITR is an automotive-grade, 8-bit microcontroller from the Silicon Labs C8051F52x/F53x family. It features a high-speed CIP-51 core operating at up to 25 MIPS with a 25 MHz system clock. The device includes 8 kB of ISP Flash memory and 256 bytes of internal data RAM. Key peripherals include a 12-bit ADC with programmable throughput up to 200 ksps, a hardware SPI interface, a UART, and a LIN 2.1 controller. It operates within a supply voltage range of 2.0 V to 5.25 V and supports an extended 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 data-dependent windowed interrupt generation
• 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
• Fluid level monitoring applications

Procurement Notes

Verify the specific suffix ITR against the manufacturer's current product selection guide to confirm package type and tape-and-reel configuration. Confirm that the component meets the required AEC-Q100 qualification levels for your target automotive application. Check for any end-of-life notices or last-time-buy notifications associated with this specific part number before finalizing procurement plans.

Selection Notes

Select this component when an automotive-compliant 8-bit MCU with integrated LIN communication is required. It is suitable for designs needing a 12-bit ADC and on-chip debug capabilities within a small form factor. Ensure the design utilizes the specified 2.0 V to 5.25 V supply range and operates within the –40 °C to +125 °C temperature envelope.

Part Context

This microcontroller belongs to the C8051F52x/F53x series, which combines a traditional 8051 instruction set with modern mixed-signal system-on-chip technology. The family is designed for high integration, reducing external component count. The C8051F531A variant specifically provides 8 kB of Flash memory, distinguishing it from other members of the series with different memory capacities.

Replacement Considerations

Silicon Labs recommends the EFM8BB52F16I-QFN20 as a replacement for related parts in this family. Verify pin compatibility and software migration requirements when considering alternative devices.