C8051F812-GM

Overview

The C8051F812-GM is an 8-bit microcontroller from the Silicon Labs C8051F80x-83x family, featuring a high-speed 8051 core with up to 25 MHz clock speed and 25 MIPS throughput. It includes 8 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. The device integrates a 10-bit ADC supporting up to 500 ksps conversion rate and 16 external single-ended inputs. Key peripherals include a capacitance-to-digital converter for capacitive touch sensing, three general-purpose 16-bit timers, a Programmable Counter Array (PCA), and communication interfaces such as UART, SMBus, and SPI. It operates on a supply voltage range of 1.8 V to 3.6 V and is available in a QFN-20 package.

Feature Summary

• Integrated capacitance-to-digital converter supports buttons, sliders, wheels, and proximity sensing with fast conversion times and auto-scan capabilities.
• On-chip debug circuitry enables full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• High-speed pipelined 8051 core executes 70% of instructions in one or two system clocks for efficient processing.
• Comprehensive analog peripherals include a 10-bit ADC, programmable comparator, and built-in temperature sensor.

Applications

• Capacitive touch interface designs utilizing integrated sensing capabilities
• Portable devices requiring low-voltage operation and mixed-signal processing
• Industrial control systems using serial communication protocols
• Battery-powered applications benefiting from multiple power management modes

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific revision matches project requirements, as this part is marked Not Recommended for New Designs. Check for RoHS compliance documentation and ensure storage conditions adhere to moisture sensitivity levels specified in the datasheet to prevent package damage during assembly.

Selection Notes

Select this MCU when existing designs utilize the C8051F80x-83x family and require migration or maintenance support. Consider the integrated capacitive touch features if user interface elements are needed without external controllers. Evaluate the 1.8 V to 3.6 V operating range against system power constraints. Review the pinout compatibility if replacing older variants within the same series.

Part Context

This component belongs to the C8051F80x-83x mixed-signal ISP Flash MCU family by Silicon Labs. It shares architectural similarities with other members like the C8051F801-GM but differs in memory size and peripheral configuration. The family is characterized by its fully static operation and extensive on-chip analog and digital peripherals, targeting cost-sensitive embedded applications.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. As the component is designated Not Recommended for New Designs, consult Silicon Labs technical support for current alternative recommendations suitable for new development projects.