C8051F581-IQ

Overview

The C8051F581-IQ is an 8-bit mixed-signal microcontroller from Silicon Labs, featuring a high-speed 8051 core operating at up to 50 MHz. It integrates 128 kB of in-system programmable Flash memory and 8448 bytes of internal data RAM. The device includes a 12-bit ADC with up to 200 ksps throughput, three comparators, and extensive digital peripherals such as CAN 2.0, LIN 2.1, two UARTs, SMBus, and SPI. It supports a supply voltage range of 1.8 V to 5.25 V and operates within a temperature range of –40 °C to +125 °C.

Feature Summary

• High-performance 8051 core with pipelined architecture for efficient instruction execution
• Integrated analog peripherals including a 12-bit ADC and programmable comparators
• Comprehensive digital communication interfaces supporting CAN, LIN, UART, SMBus, and SPI
• On-chip debug circuitry enabling full-speed non-intrusive in-system debugging

Applications

• Motor control systems
• Sensor interface circuits
• Automotive parking assistance systems
• Seat position and adjustment controllers
• Industrial liquid level monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific package variant matches design requirements. Check current lifecycle status as this family may be subject to discontinuation notices. Ensure environmental compliance documentation aligns with target market regulations before finalizing procurement orders.

Selection Notes

Evaluate pin count and I/O availability against system interface needs. Compare memory sizes across the C8051F58x family to match application code and data storage requirements. Assess peripheral sets like CAN or LIN if specific bus protocols are mandatory. Consider thermal performance and power consumption profiles relative to the intended operating environment constraints.

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 memory configurations and package options. The series is designed for applications requiring robust analog capabilities alongside standard digital processing functions.

Replacement Considerations

EFM8BB31F64I-D-QFN32R is listed as an available substitute option.