C8051F912-D-GUR

Overview

The C8051F912-D-GUR is an 8-bit microcontroller from Silicon Labs featuring a CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock. It integrates 16 kB of in-system programmable Flash memory and 768 bytes of RAM. The device includes a 12-bit SAR ADC with up to 75 ksps throughput, two comparators, and a built-in DC-DC converter supporting operation from 0.9 V to 3.6 V. It offers 16 I/O pins, multiple serial interfaces including SMBus, SPI, and UART, and operates within a temperature range of -40°C to +85°C in a 24-pin QFN package.

Feature Summary

• Ultra-low power architecture with sleep modes as low as 10 nA for memory retention and 300 nA with the low-frequency oscillator active.
• Integrated DC-DC converter enables efficient single-cell battery operation down to 0.9 V while maintaining stable internal voltage regulation.
• High-resolution 12-bit analog-to-digital converter with programmable gain amplifier and auto-averaging accumulator for precise signal acquisition.
• Flexible clocking system supports on-the-fly switching between high-speed internal oscillators, low-power oscillators, and external crystals.

Applications

• Single or dual battery powered sensor nodes
• Wireless magnetoresistive sensor networks
• Portable medical devices requiring low voltage operation
• Industrial monitoring systems with battery backup

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package and temperature grade. Check for obsolescence notices or lifecycle status updates prior to finalizing procurement plans. Ensure supply chain documentation aligns with RoHS and REACH compliance requirements for the target market.

Selection Notes

Select this model when ultra-low standby current and wide input voltage ranges are critical. The integrated DC-DC converter makes it suitable for applications powered by single-cell lithium batteries. Choose this variant over the F90x series if 16 kB of program memory and 12-bit ADC resolution are required. Ensure the design accommodates the 24-pin QFN thermal pad requirements for adequate heat dissipation.

Part Context

This component belongs to the C8051F9xx family of mixed-signal microcontrollers designed for extreme low-power efficiency. It shares architectural similarities with the C8051F90x series but provides increased memory capacity and enhanced analog performance. The family utilizes the CIP-51 core to deliver high instruction throughput while maintaining compatibility with standard 8051 development tools and software ecosystems.

Replacement Considerations

Public confirmed substitute part numbers: C8051F912-D-GM (QFN package alternative), C8051F912-D-GMR (Reel packaging alternative). Verify pinout compatibility and firmware portability before substitution.

FAQ

What is the minimum operating voltage for the C8051F912?

The device supports continuous operation from 0.9 V to 3.6 V when utilizing the built-in DC-DC converter.

Does the C8051F912 support capacitive touch sensing?

Yes, the device supports up to 15 capacitive touch sense inputs via its configurable digital peripherals.

How many serial communication interfaces are available concurrently?

The MCU provides hardware SMBus, two SPI ports, and a UART that can operate concurrently.