C8051F812-GU

Overview

The C8051F812-GU is a mixed-signal ISP Flash MCU from the C8051F80x-83x family by Silicon Labs. It features an 8051 core with up to 25 MHz clock speed and 25 MIPS throughput. The device includes 8 kB of in-system programmable Flash memory, 512 bytes of internal data RAM, and a 10-bit ADC supporting up to 500 ksps. It integrates a capacitance-to-digital converter for capacitive touch sensing, offering 16-bit resolution and auto-scan capabilities. The component operates within a supply voltage range of 1.8 V to 3.6 V and is housed in a 24-pin QSOP package.

Feature Summary

• Integrates a capacitance-to-digital converter supporting buttons, sliders, wheels, and proximity sensing with fast conversion times and auto-scan functionality.
• Features a high-speed pipelined 8051 microcontroller core capable of executing most instructions in one or two system clocks.
• Includes on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Provides analog peripherals such as a 10-bit ADC, programmable comparators, and a built-in temperature sensor.

Applications

• Capacitive touch sensing interfaces
• Mixed-signal embedded control systems
• Portable instrumentation

Procurement Notes

Verify component authenticity through authorized channels due to end-of-life status. Confirm datasheet revision and ordering suffixes match design requirements. Check for moisture sensitivity handling during storage and assembly. Validate pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this part for designs requiring integrated capacitive touch sensing alongside standard 8051 processing. Ensure voltage levels align with the 1.8 V to 3.6 V operating range. Consider the QSOP-24 package constraints for board space. Evaluate if the 8 kB Flash and 512 B RAM meet application memory needs.

Part Context

This component belongs to the C8051F80x-83x series of mixed-signal MCUs. These devices are designed for applications needing high integration of analog and digital functions. The series supports in-system programming and offers various package options including QFN and SOIC variants.

Replacement Considerations

Silicon Labs recommends alternative parts for new designs. Verify specific cross-references with manufacturer documentation for functional equivalence.

FAQ

What is the maximum sampling rate of the ADC?

The 10-bit ADC supports sampling rates up to 500 ksps.

Does the device support capacitive touch sensing?

Yes, it includes a capacitance-to-digital converter that supports buttons, sliders, wheels, and capacitive proximity sensing.