C8051F990-C-GM

Overview

The C8051F990-C-GM is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a CIP-51 core operating at up to 25 MHz. It integrates 8 KB of Flash memory and 512 bytes of RAM within a 20-QFN (3x3 mm) package. The device supports a supply voltage range of 1.8 V to 3.6 V and includes nine 12-bit ADC channels with an analog multiplexer. Key peripherals include SMBus/I2C, SPI, UART/USART interfaces, four 16-bit timers, a programmable counter/timer array, and capacitive touch inputs.

Feature Summary

• Integrated capacitive touch sensing capabilities for button, slider, and proximity detection applications
• Ultra-low power consumption in both active and sleep modes
• On-chip precision internal oscillator with spread spectrum technology
• In-system full-speed non-intrusive debug interface

Applications

• Capacitive touch sliders and buttons
• HVAC control panels
• Consumer appliance interfaces
• Industrial sensor nodes

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot traceability and check for relevant certifications such as RoHS compliance. Review official errata sheets for known silicon revisions before finalizing design integration. Ensure storage conditions meet moisture sensitivity level requirements to prevent package damage during assembly.

Selection Notes

Select this model when low-power capacitive touch sensing is required alongside standard mixed-signal processing. Compare against C8051F98x variants if different pin counts or peripheral sets are needed. Verify that the 20-QFN package fits the target PCB footprint constraints. Ensure the 1.8V to 3.6V supply range aligns with the system power architecture.

Part Context

This part belongs to the C8051F9xx family of fully integrated mixed-signal system-on-a-chip MCUs. These devices combine an 8051-compatible core with high-performance analog peripherals and capacitive touch sensing features. The family targets applications requiring minimal external components and efficient power management in compact form factors.

Replacement Considerations

Check for C8051F980-C-GMR or other C8051F9xx series members with compatible pinouts and peripheral sets. Verify equivalent Flash size and ADC channel counts. Confirm package dimensions match the existing board layout. Review datasheet addendums for any functional differences between specific suffixes.