C8051F931-F-GMR

Overview

The C8051F931-F-GMR is an 8-bit microcontroller from the Silicon Labs C8051F9xx series, featuring a high-speed CIP-51 core operating at up to 25 MIPS with a 25 MHz clock. It integrates 64 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 a built-in DC-DC converter for one-cell mode operation. Key peripherals include a 10-bit SAR ADC with 23 external inputs, two comparators, and multiple digital interfaces including SMBus, SPI, and UART.

Feature Summary

• Integrated hardware SmaRTClock oscillator supporting real-time clock functions with low power consumption
• Built-in DC-DC converter enabling efficient operation in single-cell battery applications
• On-chip debug circuitry facilitating full-speed, non-intrusive in-system debugging without external emulators
• High-speed 8051 compatible core with pipelined architecture executing most instructions in one or two system clocks

Applications

• Single or dual battery powered portable devices
• Low power embedded control systems requiring real-time clock functionality
• Battery management systems utilizing integrated voltage monitors and current references

Procurement Notes

Verify the specific suffix 'F' against official documentation to confirm package type and temperature grade. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the ordering part number matches the exact silicon revision and packaging format required by your manufacturing line.

Selection Notes

Select this component when designing for ultra-low voltage environments down to 0.9 V. The integrated DC-DC converter makes it suitable for single-cell lithium battery applications. Choose this model over variants with less Flash if code space requirements exceed 32 kB. Verify that the 32-pin QFN package fits within your board layout constraints.

Part Context

This MCU belongs to the C8051F9xx family, which emphasizes low-voltage analog integration alongside standard 8051 digital capabilities. It shares architectural similarities with the C8051F930 but offers distinct peripheral configurations. The family is designed for cost-sensitive, battery-operated applications where power efficiency and analog precision are critical design parameters.

Replacement Considerations

C8051F930-G-GMR