C8051F974-A-GMR

Overview

The C8051F974-A-GMR is an 8-bit microcontroller from Silicon Labs, based on the standard 8051 core architecture. It operates at a maximum clock frequency of 25 MHz and features 16 kB of in-system programmable Flash memory alongside 4 kB of RAM. The device is housed in a QFN-32 package and supports a supply voltage range of 1.8 V to 3.6 V. Key peripherals include a 10-bit ADC with 28 channels, four timers/counters, and communication interfaces such as I2C, SPI, and UART. It is designed for low-power applications with capacitive sensing capabilities.

Feature Summary

• Integrates a high-performance 8051-compatible core with in-system programmable Flash memory for flexible code storage and updates.
• Features extensive analog connectivity with a 10-bit ADC supporting up to 28 external channels for precise signal acquisition.
• Includes dedicated hardware for low-power capacitive sensing, enabling touch interface implementations without external components.
• Provides versatile digital communication options through integrated I2C, SPI, and UART modules for system interconnectivity.

Applications

• Battery-powered portable devices requiring low power consumption and capacitive touch input
• Industrial control systems utilizing multiple analog sensor inputs
• Consumer electronics with embedded firmware update requirements
• Data acquisition systems needing multi-channel signal monitoring

Procurement Notes

Verify the specific suffix against official documentation, as packaging variations may exist. Confirm current availability status directly with authorized distributors or the manufacturer, as this part number may be subject to obsolescence notices. Ensure compatibility with existing design constraints regarding the QFN-32 footprint and operating voltage range before finalizing procurement decisions.

Selection Notes

Select this component when an 8-bit MCU with significant analog input capacity is required within a compact QFN package. It is suitable for designs prioritizing capacitive sensing integration over high-speed processing. Consider alternative models if higher clock speeds or larger memory capacities are necessary, as this unit is optimized for cost-effective, feature-rich embedded control rather than maximum performance.

Part Context

This microcontroller belongs to the C8051F97x series, which focuses on combining standard 8051 functionality with advanced analog peripherals. The series is characterized by its low-power operation and support for capacitive sensing technologies. It serves as a bridge between basic 8-bit controllers and more complex 32-bit solutions, offering sufficient processing power for many standalone control tasks.

Replacement Considerations

Public confirmed substitute part numbers: C8051F975-A-GM.