C8051F911-GU

Overview

The Silicon Labs C8051F911-GU is an 8-bit microcontroller featuring a CIP-51 core operating up to 25 MHz. It integrates 16 kB of in-system programmable Flash memory and 768 bytes of RAM within a 24-pin QSOP package. The device supports a supply voltage range of 0.9 V to 3.6 V, utilizing a built-in DC-DC converter for single-cell operation. Key peripherals include a 10-bit ADC with 300 ksps throughput, two comparators, four general-purpose timers, and a Programmable Counter Array. Communication interfaces comprise SMBus, dual SPI, and UART.

Feature Summary

• Ultra-low power architecture supporting operation down to 0.9 V with integrated DC-DC converter for single-cell battery applications
• High-speed pipelined 8051-compatible core delivering up to 25 MIPS throughput at 25 MHz clock speeds
• Integrated mixed-signal peripherals including a 10-bit SAR ADC, on-chip temperature sensor, and programmable current reference
• Comprehensive digital connectivity with hardware-implemented SMBus, dual SPI, and UART serial ports

Applications

• Single-cell battery-powered portable devices
• Smart metering systems
• Personal medical equipment
• Sensor interface nodes
• Energy harvesting systems

Procurement Notes

Verify the specific suffix 'GU' corresponds to the 24-pin QSOP package variant when sourcing components. Confirm that the ordering code matches the 16 kB Flash configuration distinct from the 8 kB variants in the F91x/F90x family. Ensure compatibility with standard surface-mount assembly processes for the specified package type.

Selection Notes

Select this component for designs requiring extended battery life through ultra-low sleep currents and fast wake-up times. The integrated DC-DC converter enables stable operation from a single lithium cell. Choose this model over lower-memory variants if the application requires 16 kB of program storage or specific pin configurations available only in the F91x series.

Part Context

This part belongs to the C8051F91x-C8051F90x series of ultra-low power microcontrollers from Silicon Laboratories. The series is characterized by its ability to operate across a wide voltage range using either one or two battery cells. The F911 variant specifically provides the higher capacity memory configuration within this low-power family.

Replacement Considerations

Direct substitutes within the same package and feature set include the C8051F912-GU (12-bit ADC) and C8051F901-GU (8 kB Flash). Verify peripheral requirements such as ADC resolution and memory size before substituting.