C8051F820-GM

Overview

The C8051F820-GM is an 8-bit microcontroller from the Silicon Labs C8051F80x-83x family, featuring a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock. It includes 8 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. The device integrates a capacitance-to-digital converter supporting up to 16 channels for touch sensing, a 10-bit ADC with up to 500 ksps, and a comparator. Connectivity options include UART, SMBus, and SPI interfaces. It operates on a supply voltage of 1.8 V to 3.6 V and is housed in a QFN-20 package.

Feature Summary

• Integrated capacitance-to-digital converter enables buttons, sliders, wheels, and capacitive proximity sensing with fast conversion times.

Applications

• Capacitive touch sensing applications
• Low-voltage embedded control systems
• Portable devices requiring mixed-signal processing

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package variant. Check current lifecycle status as this series may be marked Not Recommended for New Designs. Ensure environmental compliance documentation aligns with project requirements before finalizing procurement.

Selection Notes

Select this part when a compact 8-bit MCU with integrated capacitive touch capabilities is required. The QFN-20 package suits space-constrained designs. Evaluate if the 8 kB Flash and 512-byte RAM meet application memory needs. Consider the 1.8 V to 3.6 V operating range for battery-powered systems. Verify peripheral compatibility with existing system interfaces.

Part Context

This component belongs to the Silicon Labs C8051F80x-83x mixed-signal ISP Flash MCU family. These devices are designed for cost-sensitive applications requiring on-chip debug capabilities. The family shares common architectural features but varies in memory size and peripheral configurations. The C8051F820-GM specifically offers the QFN-20 package option within this lineup.

Replacement Considerations

Consult the official product selection guide for pin-compatible or functionally equivalent alternatives within the same family. Verify that any substitute maintains the required package dimensions and electrical characteristics. Review datasheet updates for any changes in recommended design practices.