C8051F990-C-GMR

Overview

The C8051F990-C-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 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 nine 12-bit ADCs with an analog multiplexer. Connectivity options include SMBus/I2C, SPI, and UART/USART interfaces. Additional peripherals comprise a temperature sensor, watchdog timer, power-on reset, and capacitive touch inputs.

Feature Summary

• Integrated capacitive touch sensing capabilities for button, slider, and proximity detection applications
• Ultra-low power consumption architecture optimized for active and sleep modes
• In-system full-speed non-intrusive debug interface embedded on-chip
• Precision internal oscillator with spread spectrum technology for reduced electromagnetic interference

Applications

• Capacitive slider and button interfaces
• HVAC control panels and residential thermostats
• Consumer electronics and game system interfaces
• Industrial communication panels

Procurement Notes

Verify component status as this part number is listed as obsolete or not recommended for new designs in multiple distributor records. Confirm availability through authorized channels or secondary markets if current production is required. Ensure compatibility with existing design files before procurement due to potential end-of-life constraints.

Selection Notes

Select this component for applications requiring integrated capacitive touch sensing alongside standard mixed-signal processing. The CIP-51 core offers high performance relative to traditional 8051 architectures. Consider the specific pinout and peripheral set against alternatives like the C8051F980 if ADC count or touch input requirements differ.

Part Context

This MCU belongs to the C8051F9xx family, designed as fully integrated mixed-signal system-on-a-chip solutions. The series emphasizes low power operation and high integration, combining digital processing with analog peripherals. It targets cost-sensitive embedded systems needing robust touch control features without external sensors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. The C8051F980 shares similar architectural features but may differ in specific peripheral configurations such as ADC count or touch input capacity.