C8051F581-IQR

Overview

The C8051F581-IQR is an 8-bit mixed-signal ISP Flash MCU from the Silicon Labs C8051F58x family, housed in a 48-pin QFP package. It features a high-speed 8051 core operating at up to 50 MHz with pipelined architecture. The device includes 128 kB of banked Flash memory and 8448 bytes of internal data RAM. Analog peripherals consist of a 12-bit ADC supporting up to 200 ksps and three comparators. Digital interfaces include CAN 2.0, LIN 2.1, two UARTs, SMBus, and SPI. It operates on a supply voltage of 1.8 V to 5.25 V and supports automotive temperature ranges.

Feature Summary

• Integrated on-chip debug circuitry for full-speed, non-intrusive in-system debugging without external emulators.
• Supports CAN 2.0 and LIN 2.1 controllers that operate without requiring an external crystal.
• Features a programmable internal oscillator with ±0.5% accuracy suitable for precise communication timing.

Applications

• Motor control systems
• Sensor interface circuits
• Automotive parking assistance systems

Procurement Notes

Verify component authenticity through authorized channels as this part is marked Not Recommended for New Designs. Confirm package integrity upon receipt. Ensure ESD precautions are followed during handling. Check revision markings against the datasheet. Validate pin compatibility if replacing existing designs.

Selection Notes

Select this MCU when a robust 8051 architecture with integrated CAN and LIN capabilities is required. Consider the 48-pin QFP form factor for board space constraints. Evaluate the 12-bit ADC resolution against application signal requirements. Review power consumption specifications for battery-operated scenarios.

Part Context

This component belongs to the C8051F58x/F59x Mixed Signal ISP Flash MCU Family. It shares architectural similarities with other members like the C8051F580 and C8051F582 but differs in specific peripheral configurations and package options. The family emphasizes high integration for industrial and automotive applications.

Replacement Considerations

C8051F580-IQR

FAQ

Does the C8051F581 require an external crystal for CAN or LIN operation?

No, the device includes a programmable internal oscillator with sufficient accuracy for CAN and master LIN operation without an external crystal.

What is the maximum throughput of the microcontroller core?

The pipelined instruction architecture allows for up to 50 MIPS throughput when operating at a 50 MHz clock frequency.