With an integrated dc-dc converter, the C8051F9xx has been designed to provide a fast wake-up time, low active-mode, and ultra-low sleep mode current consumptions. The C8051F9xx family not only provides high performance while saving power but also unprecedented functional density in a small footprint.

• Lowest Voltage Operation
  With an integrated dc-dc converter, the C8051F9xx family is the industry’s first MCU capable of operating down to 0.9 V, enabling single-cell battery operation and dramatically increasing battery life for dual-cell applications, ultimately shrinking the form factor and cost of battery-powered products.
  
• Greatest Power Efficiency
  The C8051F9xx family is optimized in all operating modes to enable customers to either move to a single-cell design or increase the system’s battery life by up to 2x in parallel dual-cell designs.
  
• Highest Functional Density
  With 64 kB of Flash and 4 kB of RAM in a 4 x 4 mm package, the C8051F9xx provides customers with increased memory for data-intensive applications. The small form factor makes these devices ideal for applications where end-product size is critical.
  
• Best-in-Class Tools
  Silicon Labs delivers industry-leading tools to help speed design and accelerate market entry. The complete, low-cost professional C8051F930 Development Kit includes everything required to immediately begin system design. Silicon Labs’ Battery Life Estimator, a GUI-based tool that provides details on typical battery discharge characteristics, as well as a user-editable spreadsheet is included as part of the development kit. The tool enables designers to optimize their low-voltage/low-power MCU application. An inexpensive C8051F931 ToolStick Daughter Card and Base Adapter also provide a full development environment. Expanding on the ToolStick931DC, the Capacitive Touch Sense Daughter Card includes 4 Capacitive Touch Sense pads to enable customers to develop applications implementing capacitive touch sense switches.
  

• Portable personal medical products
• Remote controls
• Portable audio
• Consumer electronics
• Wireless sensors and security
• Wireless meter reading
• Industrial monitoring and control