C8051F911-GMR

Overview

The C8051F911-GMR is an 8-bit microcontroller from Silicon Labs, part of the C8051F9xx series. It features a high-speed pipelined 8051 core operating at up to 25 MHz with 25 MIPS throughput. The device includes 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 such as SMBus, SPI, and UART. It supports a supply voltage range of 0.9 V to 3.6 V and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Ultra-low power architecture with sleep mode currents as low as 10 nA and fast wake-up times.
• Integrated 10-bit analog-to-digital converter with programmable throughput and on-chip voltage reference.
• High-performance 8051 core executing 70% of instructions in one or two system clocks.
• Built-in DC-DC converter enabling single-cell battery operation down to 0.9 V.

Applications

• Portable consumer electronics requiring extended battery life
• Smart metering and utility monitoring systems
• Personal medical devices and health monitors
• Sensor interface nodes in industrial automation

Procurement Notes

Verify the specific suffix 'GMR' against the manufacturer's current ordering guide to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for the 24-pin QFN package. Confirm that the 16 kB Flash variant matches the application requirements, as other variants in the family may have different memory sizes.

Selection Notes

Select this component when a balance of low power consumption and moderate processing speed is required. The integrated DC-DC converter makes it suitable for single-cell lithium battery applications. Consider the 10-bit ADC resolution and available I/O count for sensor interfacing needs. Verify that the 24-pin QFN package fits the mechanical constraints of the design.

Part Context

This MCU belongs to the C8051F9xx family, designed for ultra-low power applications. It shares architectural similarities with other members like the C8051F912 but differs in Flash size and ADC resolution. The family emphasizes energy efficiency through advanced power management modes and efficient clocking structures.

Replacement Considerations

Check for direct pin-compatible substitutes within the C8051F9xx series, such as the C8051F901, noting differences in Flash capacity. Evaluate newer generations like the EFM8 series for potential upgrades, ensuring software compatibility and peripheral mapping are addressed.

FAQ

What is the minimum operating voltage for the C8051F911?

The C8051F911 supports a supply voltage range from 0.9 V to 3.6 V, allowing operation in single-cell battery configurations using its internal DC-DC converter.

Does the C8051F911 support capacitive touch sensing?

Yes, the device includes up to 15 capacitive touch sense inputs via its analog multiplexer and comparator resources.