• Supports single-cell (0.9 to 1.8 V) and dual-cell (1.8 to 3.6 V) operations.
• Includes a high-efficiency DC-DC boost converter and a low dropout (LDO) voltage regulator.
• Features multiple internal oscillators, including smaRTClock, low power 20 MHz, and precision 24.5 MHz with spread spectrum mode.
• Offers ultra-low current sleep mode and fast wake-up capabilities.
• Equipped with a 25 MHz, single-cycle 8051 compatible CPU with low active-mode current.
• Provides 64 kB Flash memory and 4 kB RAM in a compact 4 x 4 mm package.
• Includes a burst mode 10-bit ADC with fast start-up VREF and capacitive touch sense support.

• Portable personal medical products, remote controls, portable audio, consumer electronics, wireless sensors and security, wireless meter reading, and industrial monitoring and control.

The C8051F9xx product family is the first MCU family capable of operating from 0.9 V to 3.6 V, supporting single-cell battery operation and enhancing battery life in dual-cell applications. It integrates a DC-DC converter for fast wake-up and low power consumption, offering high performance and functional density in a small footprint. The family includes 64 kB Flash and 4 kB RAM, a 10-bit ADC, smaRTClock timing module, and multiple oscillators, providing a comprehensive system-on-chip solution.

The C8051F9xx family is optimized for low-voltage operation, enabling single-cell battery use and extending battery life in dual-cell designs. It offers high functional density with 64 kB Flash and 4 kB RAM in a compact package, ideal for size-critical applications. Silicon Labs provides industry-leading tools for rapid design and market entry, including a professional development kit and ToolStick Daughter Card.

• Low active current mode: 170 uA/MHz @25 MHz.
• Ultra-low current sleep mode: < 50 nA.
• Fast settling time: 10-bit ADC with internal VREF settling in < 1.7 uS.
• Fast wake-up time: < 2 us.

The DC-DC converter boosts battery voltage in single-cell mode, requiring only an external 0.68 H inductor and decoupling capacitors. It provides programmable output voltage from 1.8 to 3.3 V, supplying 65 mW for internal and external use.