C8051F331-GM

Overview

The C8051F331-GM is a mixed-signal ISP Flash microcontroller from Silicon Labs, featuring an 8051 core with up to 25 MIPS throughput at a 25 MHz clock. It includes 8 kB of in-system programmable Flash memory and 768 bytes of internal data RAM (256 + 512). The device operates on a supply voltage of 2.7 V to 3.6 V and supports a temperature range of –40 °C to +85 °C. Key peripherals include a voltage comparator, four general-purpose 16-bit timers, a Programmable Counter Array (PCA), and serial interfaces such as UART, SMBus, and SPI.

Feature Summary

• Integrated high-speed 8051 microcontroller core with pipelined architecture for efficient instruction execution.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Flexible digital I/O configuration with a programmable crossbar allowing pin assignment flexibility.
• Comprehensive analog and digital peripheral set including comparators, timers, and multiple serial communication ports.

Applications

• In-system programming and firmware updates via ISP capabilities
• Industrial control systems requiring robust digital I/O and timing functions
• Data acquisition applications utilizing onboard comparators and timers
• Embedded communication nodes using UART, SMBus, or SPI interfaces

Procurement Notes

Verify the specific suffix 'GM' corresponds to the QFN-20 package variant when sourcing. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing standards. Check for current lifecycle status, as this series may be marked as not recommended for new designs. Ensure compatibility with existing development tools supporting the C2 interface for programming and debugging.

Selection Notes

Select this model when a compact 20-pin solution is required alongside standard 8051 compatibility. Consider the C8051F33x family for its integrated analog peripherals and flexible pin mapping. Evaluate the 25 MHz performance limit against system timing requirements. Review the available Flash size and RAM capacity to ensure sufficient memory for application code and data storage needs.

Part Context

This component belongs to the C8051F33x series of mixed-signal microcontrollers designed by Silicon Labs. The series emphasizes high integration, combining a fast 8051 CPU with extensive analog and digital peripherals on a single chip. These devices are engineered for cost-sensitive applications requiring in-system programmability and flexible I/O configurations.

Replacement Considerations

Consult the official product selection guide for direct functional equivalents within the C8051F33x family. Verify pinout and memory specifications before substituting with other variants. Cross-reference with newer generations if long-term availability is a concern, noting potential architectural differences.