C8051F990-GM

Overview

The C8051F990-GM is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a CIP-51 8051-compatible core operating at up to 25 MHz. It integrates 8 kB of in-system programmable Flash memory and 512 bytes of RAM within a compact 20-QFN package. The device includes a high-speed analog-to-digital converter with selectable 10-bit (300 ksps) or 12-bit (75 ksps) resolution, alongside multiple serial communication interfaces including SMBus/I2C, SPI, and UART. It supports a supply voltage range of 1.8 V to 3.6 V and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated capacitive touch sensing capabilities via QuickSense technology for button, slider, and proximity detection applications
• Ultra-low power consumption architecture optimized for both active operation and sleep modes
• On-chip precision internal oscillator with spread spectrum technology to minimize electromagnetic interference
• Full-speed non-intrusive in-system debugging interface embedded directly on the silicon

Applications

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

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package marking and date codes against official datasheets. Check for obsolescence notices as this specific part number may have been superseded by newer revisions within the C8051F9xx family. Ensure ESD handling protocols are followed during storage and assembly.

Selection Notes

Select this component when low-power capacitive touch sensing is required alongside mixed-signal processing. Compare pin counts and peripheral sets against the C8051F98x sub-series if fewer I/Os suffice. Verify that the 25 MHz clock speed meets real-time processing requirements. Consider the 20-QFN footprint constraints for PCB layout optimization.

Part Context

This MCU belongs to the C8051F9xx series of fully integrated mixed-signal system-on-chip devices. It shares architectural similarities with the C8051F98x series but offers specific peripheral configurations tailored for touch sensing. The series emphasizes stand-alone functionality by integrating essential system components like oscillators, resets, and monitors on a single die.

Replacement Considerations

Public confirmed substitute part numbers: C8051F990-C-GMR.