C8051F990-GMR

Overview

The C8051F990-GMR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a CIP-51 core operating at up to 25MHz. It integrates 8KB of in-system programmable Flash memory and 512 bytes of RAM within a 20-QFN (3x3) package. The device supports a supply voltage range of 1.8V to 3.6V and includes a 12-bit ADC with analog multiplexer. Key peripherals include SMBus/I2C, SPI, UART interfaces, four general-purpose timers, and a Programmable Counter Array.

Feature Summary

• Integrated capacitive touch sensing capabilities via QuickSense inputs for button, slider, and proximity detection applications
• Ultra-low power consumption architecture optimized for active and sleep modes in battery-operated systems
• On-chip debugging interface enabling full-speed, non-intrusive in-system programming and trace functionality
• Precision internal oscillator with spread spectrum technology to minimize electromagnetic interference emissions

Applications

• Capacitive touch sliders and buttons for consumer electronics
• HVAC control panels and residential appliance interfaces
• Portable gaming systems and handheld devices
• Industrial communication interfaces requiring low power operation

Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature grade. Confirm current manufacturing status as product lifecycle changes may affect availability. Ensure compatibility with required debug adapters such as DEBUGADAPTER1-USB for development. Check RoHS compliance and moisture sensitivity levels prior to PCB assembly planning.

Selection Notes

Select this component when capacitive touch integration is required alongside standard mixed-signal processing. Compare memory sizes and I/O counts against other C8051F9xx variants like the C8051F985 or C8051F991 if different storage or pin counts are needed. Evaluate the 12-bit ADC resolution against application signal requirements. Consider the 20-QFN footprint constraints during mechanical design.

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 extensive analog peripherals and capacitive touch sensing. The series targets applications demanding high integration, low power, and cost-effective solutions for user interface controls and sensor monitoring.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.