C8051F911-GM

Overview

The C8051F911-GM is an 8-bit microcontroller from Silicon Labs featuring a high-speed 8051 core with pipelined architecture. It operates within a supply voltage range of 0.9 V to 3.6 V, supporting single-cell (0.9–1.8 V) and dual-cell (1.8–3.6 V) battery applications. The device integrates 16 kB of in-system programmable Flash memory and 768 bytes of RAM. Key peripherals include a 10-bit SAR ADC with up to 300 ksps throughput, two comparators, and multiple digital interfaces including SMBus, SPI, and UART. It utilizes a 24-pin QFN package.

Feature Summary

• Ultra-low power operation with integrated DC-DC converter for single-cell battery support
• High-performance 8051 core executing 70% of instructions in one or two system clocks
• Integrated 10-bit analog-to-digital converter with auto-averaging accumulator
• On-chip debug circuitry enabling full-speed non-intrusive in-system debugging

Applications

• Portable handheld devices requiring extended battery life
• Smart metering systems and energy monitoring
• RFID tags and personal medical devices
• Sensor interface nodes and data acquisition systems
• Home security and smoke/fire detection units

Procurement Notes

Verify the specific suffix 'GM' corresponds to the 24-pin QFN package variant when sourcing. Confirm that the application voltage requirements align with the 0.9 V to 3.6 V operating range. Ensure design compatibility with the Harvard architecture instruction set. Check for RoHS compliance status if required by regional regulations. Validate pinout assignments against the official datasheet schematic.

Selection Notes

Select this component for designs prioritizing ultra-low current consumption in both active and sleep modes. The integrated DC-DC converter enables efficient operation from a single lithium cell. Consider the 10-bit ADC resolution and speed for precision sensing tasks. Evaluate the available I/O count and peripheral sets against interface requirements. Review the clock source options, including the SmaRTClock, for timing accuracy needs.

Part Context

This part belongs to the C8051F91x/90x series of ultra-low power microcontrollers. The series is distinguished by its ability to operate across a wide voltage range using internal power management circuits. It targets embedded applications where power efficiency and integration density are critical constraints.

Replacement Considerations

C8051F912-GM: Offers 12-bit ADC resolution instead of 10-bit.

FAQ

How does the C8051F911-GM handle power supply variations?

It features a built-in DC-DC converter and LDO regulator, allowing operation from 0.9 V to 3.6 V. This supports single-cell mode (0.9–1.8 V) and dual-cell mode (1.8–3.6 V).

What is the wake-up time for this microcontroller?

The device provides a fast wake-up time of 2 microseconds in two-cell mode.

Can the comparators be used as wake-up sources?

Yes, the two on-chip comparators have configurable hysteresis and response times, and can be set as wake-up or reset sources.