C8051F902-GUR

Overview

The C8051F902-GUR is an ultra-low power mixed-signal microcontroller from Silicon Labs, featuring a high-speed 8051 core operating at up to 25 MHz. It integrates 8 kB of in-system programmable Flash memory and 768 bytes of RAM. The device supports a supply voltage range of 0.9 V to 3.6 V, enabling operation in single or dual battery configurations via a built-in DC-DC converter. Key peripherals include a 12-bit ADC with up to 75 ksps throughput, two comparators, and multiple digital communication interfaces.

Feature Summary

• Ultra-low power architecture with sleep modes as low as 10 nA and rapid wake-up times
• Integrated 12-bit SAR ADC with auto-averaging accumulator and burst mode for enhanced resolution
• Built-in DC-DC converter allowing continuous operation from 0.9 V to 3.6 V
• On-chip debug circuitry supporting non-intrusive in-system debugging without external emulators

Applications

• Battery-powered sensor nodes requiring extended operational life
• Portable medical devices utilizing low-voltage analog signal processing
• Industrial monitoring systems with strict power consumption constraints

Procurement Notes

Verify the specific suffix GUR against official datasheets to confirm package type and reel specifications. Ensure compatibility with existing PCB footprints for the QSOP-24 configuration. Confirm that the 0.9 V minimum operating voltage aligns with the target system's power rail design and brownout detector settings.

Selection Notes

Select this component when application requirements demand minimal active current consumption alongside precise analog-to-digital conversion capabilities. The integrated DC-DC converter makes it suitable for single-cell lithium battery applications where voltage regulation is critical. Evaluate the 12-bit ADC performance against noise sensitivity requirements before finalizing the design.

Part Context

This part belongs to the C8051F9xx series of mixed-signal microcontrollers designed for extreme power efficiency. It shares architectural similarities with the C8051F91x series but offers reduced Flash memory capacity. The series emphasizes low-power operation through advanced clock management and peripheral control features.

Replacement Considerations

C8051F902-D-GUR: Identical functional specifications with alternative packaging options.