C8051F981-GM

Overview

The C8051F981-GM is an 8-bit microcontroller from Silicon Labs, featuring the CIP-51 8051 core. It operates at a maximum clock frequency of 25 MHz and includes 8 kB of Flash program memory with 512 bytes of RAM. The device is housed in a 20-pin QFN package (4x4 mm) and supports surface mount installation. It functions within a supply voltage range of 1.8 V to 3.6 V and withstands operating temperatures from -40°C to +85°C.

Feature Summary

• Integrates enhanced communication interfaces including SPI, UART/USART, I2C, and SMBus for versatile connectivity.
• Features four timer/counters for precise timing control and event counting applications.
• Utilizes an internal oscillator system for clock generation without external components.

Applications

• Battery-powered embedded systems requiring low voltage operation
• Industrial control modules utilizing serial communication protocols
• Sensor interface nodes with timer-based data acquisition

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package marking and datasheet revision compatibility before integration. Check for end-of-life status or obsolescence notices as availability may be restricted. Ensure environmental compliance documentation matches project requirements.

Selection Notes

Select this model when an 8-bit architecture with integrated serial peripherals is required. Consider the 25 MHz speed limit and 8 kB memory capacity for code size constraints. Evaluate the 1.8 V to 3.6 V supply range against system power rails. Compare pin count and package dimensions against PCB layout limitations.

Part Context

This component belongs to the C8051F9xx series of 8-bit microcontrollers. The series emphasizes mixed-signal capabilities and on-chip debugging features typical of Silicon Labs' C8051 family. It shares architectural similarities with other members like the C8051F980, differing primarily in specific peripheral configurations and memory sizes.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official Silicon Labs documentation for cross-reference recommendations or updated product line replacements.