C8051F991-GM

Overview

The C8051F991-GM is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, utilizing the CIP-51 core. It features 25 MHz maximum clock speed and 8KB of in-system programmable Flash memory. The device includes 512 bytes of RAM and operates within a voltage range of 1.8V to 3.6V. It is housed in a 20-QFN (3x3) package with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates capacitive sensing capabilities for touch interface applications
• Supports standard communication protocols including SPI and I2C
• Includes internal oscillator and power-on reset circuitry

Applications

• Capacitive touch sensor controllers
• Low-power embedded control systems
• Portable battery-operated devices

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm lot codes and date codes against current production status. Ensure handling procedures comply with moisture sensitivity level requirements during storage and assembly processes.

Selection Notes

Select this model when specific capacitive sensing integration is required alongside standard 8051 functionality. Consider the 20-pin QFN footprint for space-constrained designs. Evaluate power consumption profiles against application requirements compared to other members of the C8051F9xx family.

Part Context

This component belongs to the C8051F9xx series of ultra-low power microcontrollers designed by Silicon Labs. The series emphasizes energy efficiency and integrated peripherals for portable electronics. The C8051F991 variant specifically targets applications requiring capacitive touch sensing without external dedicated controllers.

Replacement Considerations

Check for C8051F991-C-GM as a potential alternative with different temperature rating. Verify pin compatibility and software register mapping before substituting with other C8051F9xx models.