C8051F902-D-GUR

Overview

The C8051F902-D-GUR is an 8-bit microcontroller from Silicon Labs featuring a high-speed CIP-51 core operating at up to 25 MIPS with a 25 MHz clock. It integrates 8 kB of in-system programmable Flash memory and 768 bytes of RAM. The device includes a 12-bit SAR ADC with a throughput of 75 ksps, two voltage comparators, and a built-in DC-DC converter supporting operation from 0.9 V to 3.6 V. Key peripherals include hardware SMBus, dual SPI, UART, four general-purpose timers, and a PCA with watchdog capabilities. It operates within a temperature range of –40 °C to +85 °C.

Feature Summary

• Ultra-low power architecture with sleep modes as low as 10 nA and rapid wake-up times.
• Integrated 12-bit analog-to-digital converter with auto-averaging accumulator and burst mode for enhanced resolution.
• Built-in DC-DC converter enables efficient single-cell battery operation down to 0.9 V.
• On-chip debug circuitry supports full-speed, non-intrusive in-system debugging without external emulators.

Applications

• Single or dual battery powered portable devices
• Low-power industrial control systems
• Battery-operated sensor nodes

Procurement Notes

Verify the specific suffix 'D-GUR' against the manufacturer's current documentation to confirm package type (QSOP24) and reel specifications. Confirm end-of-life status and availability through authorized distributors, as this component may be subject to obsolescence notices. Ensure compatibility with existing PCB footprints and reflow profiles for the QSOP package.

Selection Notes

Select this MCU when a balance of moderate Flash capacity and high-resolution analog conversion is required in a compact package. The integrated DC-DC converter makes it suitable for applications requiring wide input voltage ranges or single-cell battery operation. Consider the 24-pin QSOP package for ease of hand-soldering during prototyping or low-volume production.

Part Context

This part belongs to the C8051F9xx series, which focuses on ultra-low power mixed-signal microcontrollers. The series shares the CIP-51 core architecture but varies in Flash size, ADC resolution, and peripheral sets. The C8051F902 specifically offers 8 kB Flash and 12-bit ADC, distinguishing it from higher-capacity variants like the F912.

Replacement Considerations

Check for direct pin-compatible substitutes within the C8051F9xx family, such as the C8051F912, if additional Flash memory is needed. Verify that any replacement maintains the same QSOP24 package and electrical characteristics, particularly the 0.9–3.6 V supply range and 12-bit ADC performance.