C8051F531-IT

Overview

The C8051F531-IT is an automotive-grade, 8-bit microcontroller from Silicon Labs, based on the CIP-51 core. It features 8 kB of ISP Flash memory and 256 bytes of internal RAM. The device includes a 12-bit ADC with up to 16 external inputs and a throughput of 200 ksps. Operating at a maximum frequency of 25 MHz, it supports a supply voltage range of 2.0 V to 5.25 V. Digital peripherals include SPI, UART, and LIN controllers. It operates within a temperature range of -40°C to +125°C and is housed in a 20-pin TSSOP package.

Feature Summary

• Automotive qualification compliant with AEC-Q100 standards for high reliability.
• Integrated 12-bit analog-to-digital converter with programmable throughput and windowed interrupt generation.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• High-precision internal oscillator providing ±0.5% accuracy for stable UART and LIN-Master operations.

Applications

• Automotive sensor interface and monitoring systems
• Industrial control applications requiring robust communication interfaces
• LIN bus network nodes in vehicle electronics

Procurement Notes

Verify the specific suffix IT corresponds to the 20-pin TSSOP package and industrial/automotive temperature grade during procurement. Confirm that the component meets AEC-Q100 requirements if used in automotive environments. Check for any recent product change notices or end-of-life announcements from Silicon Labs before finalizing orders.

Selection Notes

Select this component when a small form factor automotive MCU with integrated analog capabilities is required. The C8051F531-IT is suitable for designs needing a 12-bit ADC and LIN support without external crystals. Consider the 25 MHz processing speed and 8 kB memory size against application complexity. Ensure the 2.0 V to 5.25 V supply range matches the system power architecture.

Part Context

This part belongs to the C8051F53x family of mixed-signal microcontrollers. These devices are designed for space-constrained automotive and industrial applications. The family shares a common architecture with varying memory sizes and pin counts. The C8051F531-IT specifically offers a balance of performance and integration in a compact 20-pin package.

Replacement Considerations

Consult Silicon Labs documentation for direct replacements within the C8051F53x series. Verify pin compatibility and memory size differences when substituting with other variants in the same package.

FAQ

Does the C8051F531-IT require an external crystal for LIN Master operation?

No, the device features a high-precision internal oscillator with ±0.5% accuracy that supports UART and LIN-Master operation without an external crystal.

What is the maximum throughput of the integrated ADC?

The 12-bit ADC has a programmable throughput of up to 200 ksps.