C8051F971-A-GM

Overview

The C8051F971-A-GM is an 8-bit microcontroller from the Silicon Labs C8051F series, featuring a standard 8051 core. It operates at a maximum clock frequency of 25 MHz and includes 32 kB of in-system programmable Flash memory alongside 8 kB of RAM. The device is housed in a 32-pin QFN package measuring 5 x 5 x 0.85 mm. Key peripherals include one UART, two I2C interfaces, one SPI interface, and one PWM unit. It integrates a single 10-bit ADC with 28 channels and supports a typical operating voltage of 3 V within a temperature range of -40 °C to +85 °C.

Feature Summary

• Integrates a high-speed 8051 CPU with on-chip Flash memory for code storage.
• Provides multiple communication interfaces including UART, I2C, and SPI.
• Includes a multi-channel 10-bit analog-to-digital converter for signal acquisition.
• Features integrated pulse width modulation units for control applications.

Applications

• Embedded systems requiring mixed-signal processing capabilities
• Industrial control loops utilizing analog sensor inputs
• Data acquisition systems with serial communication requirements

Procurement Notes

Verify the specific suffix and package type against official datasheets before procurement. Confirm that the component meets the required operating temperature range and voltage specifications for the target application environment. Ensure compatibility with existing design tools and programming interfaces.

Selection Notes

Select this component when a compact 32-pin solution is required with moderate Flash capacity. It is suitable for designs needing multiple digital interfaces and analog input channels without external components. Consider the 25 MHz speed limit and available GPIO count relative to system complexity.

Part Context

This part belongs to the C8051F family of fully integrated mixed-signal microcontrollers. These devices combine a fast 8051-compatible CPU with extensive on-chip resources, reducing the need for external support circuitry. The C8051F97x variant specifically targets applications balancing processing power with peripheral integration.

Replacement Considerations

Check for direct pin-compatible upgrades within the C8051F97x series or other C8051F variants with similar memory sizes. Verify that any substitute maintains the same QFN-32 footprint and electrical characteristics.