C8051F831-GSR

Overview

The C8051F831-GSR is a mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F80x-83x family. It features a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock. The device includes up to 16 kB of in-system programmable Flash and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC supporting up to 500 ksps, a capacitive sense module with 16-bit resolution, and digital interfaces such as UART, SMBus, and SPI. It operates on a supply voltage of 1.8 to 3.6 V within a temperature range of –40 to +85 °C.

Feature Summary

• Integrated capacitive sense module supporting buttons, sliders, wheels, and proximity sensing with auto-scan capabilities.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Pipelined instruction architecture executing 70% of instructions in one or two system clocks for high performance.
• In-system programmable Flash memory allowing field upgrades and non-volatile data storage.

Applications

• Capacitive touch interface implementations
• Portable battery-powered devices
• Industrial control systems requiring analog signal processing

Procurement Notes

Verify component authenticity through authorized distributors. Confirm package type matches design requirements. Check datasheet revision status as this family is marked Not Recommended for New Designs. Ensure voltage and temperature ratings align with target application environments before procurement.

Selection Notes

Select this MCU for applications requiring integrated capacitive sensing and mixed-signal processing. Evaluate pin count and peripheral availability against specific I/O needs. Consider power consumption profiles across different operating modes. Verify compatibility with existing development tools and software libraries.

Part Context

This part belongs to the C8051F80x-83x series of mixed-signal microcontrollers. These devices are designed as complete system-on-a-chip solutions, integrating analog peripherals, digital interfaces, and a high-performance CPU. The series targets cost-sensitive embedded applications requiring robust analog capabilities and flexible connectivity options.

Replacement Considerations

Consult official documentation for direct substitutes. Verify functional equivalence regarding pinout, memory size, and peripheral sets. Assess package compatibility and thermal characteristics. Review end-of-life notices and recommended alternative families for long-term supply stability.