C8051F920-GM

Overview

The C8051F920-GM is a mixed-signal microcontroller from the Silicon Labs C8051F92x/3x family, featuring a high-speed 8051 core operating at up to 25 MHz. It provides 32 kB of in-system programmable Flash memory and 4352 bytes of internal data RAM. The device supports a supply voltage range of 0.9 V to 3.6 V, utilizing an integrated DC-DC converter for one-cell mode operation (0.9–1.8 V) and an LDO regulator for two-cell mode (1.8–3.6 V). Key analog peripherals include a 10-bit ADC with 300 ksps throughput, two comparators, and a temperature sensor. Digital interfaces comprise hardware SMBus, dual SPI, and UART ports. It is housed in a 32-pin QFN package.

Feature Summary

• Integrated DC-DC converter enables efficient single-cell battery operation down to 0.9 V
• Ultra-low power architecture with industry-leading sleep mode current consumption
• Fast wake-up times with rapid analog circuit stabilization
• On-chip SmaRTClock real-time clock oscillator requiring minimal bias current

Applications

• Single-cell or dual-cell battery-powered embedded systems
• Portable medical diagnostic equipment
• Battery-operated industrial sensors
• Low-power consumer electronics

Procurement Notes

Verify the specific suffix 'GM' corresponds to the 32-pin QFN package variant when ordering. Confirm that the 32 kB Flash capacity aligns with project requirements, as the F93x counterpart offers 64 kB. Ensure the design accommodates the 0.9–3.6 V supply range and utilizes the internal DC-DC converter if operating below 1.8 V. Cross-reference the datasheet revision for any updates to electrical characteristics or pinout definitions prior to finalizing procurement.

Selection Notes

Select this component for applications requiring extended battery life through ultra-low sleep currents and fast wake-up capabilities. The integrated DC-DC converter simplifies power management for single-cell lithium batteries. Choose this model over the F93x series if 32 kB of Flash memory is sufficient, potentially reducing cost and board space. Ensure the system design leverages the 5 V tolerant I/O pins for interfacing with higher voltage logic levels without external level shifters.

Part Context

This part belongs to the C8051F92x/3x family of mixed-signal MCUs designed for low-voltage, battery-powered applications. The family shares a common architecture including the CIP-51 core, analog peripherals, and power management features. The F920 variant specifically provides 32 kB of Flash, distinguishing it from the 64 kB F93x devices while maintaining identical peripheral sets and package options.

Replacement Considerations

The C8051F930-GM serves as a direct functional substitute with increased Flash memory (64 kB vs 32 kB). Other members of the C8051F92x/3x family may be compatible depending on specific memory and package requirements.