C8051F707-GQR

Overview

The C8051F707-GQR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F70x/71x family, housed in a 48-pin QFN package. It features a high-speed 8051 core operating at up to 25 MHz with 25 MIPS throughput. The device includes 16 kB of ISP Flash memory, 512 bytes of internal data RAM, and 32 bytes of data EEPROM. Key peripherals include a 10-bit ADC supporting up to 500 ksps, a capacitance-to-digital converter with up to 38 input channels, and multiple digital interfaces such as UART, SMBus, and SPI.

Feature Summary

• Integrated capacitance-to-digital converter supports buttons, sliders, wheels, capacitive proximity, and touch screen sensing with auto-scan capabilities.
• On-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging without requiring external emulators.
• High-speed pipelined 8051 core executes 70% of instructions in one or two system clocks for efficient processing.
• Flexible clock sources allow switching between internal oscillators and external crystals on-the-fly to support power-saving modes.

Applications

• Capacitive sensing applications including touch screens and proximity detection
• Battery-powered portable devices requiring low-voltage operation
• Industrial control systems utilizing analog signal acquisition
• Embedded systems requiring in-system programming and debugging

Procurement Notes

Verify the specific suffix GQR corresponds to the 48-pin QFN package and commercial temperature range during procurement. Confirm that the component status aligns with design lifecycle requirements, as this family may be marked as not recommended for new designs. Ensure compatibility with existing PCB footprints and reflow profiles specified for the QFN-48 package.

Selection Notes

Select this model when a compact 48-pin form factor is required alongside integrated capacitive sensing features. It is suitable for designs needing a balance of analog conversion speed and digital I/O flexibility. Consider the available Flash size and RAM capacity against application code complexity. Evaluate the voltage range requirements to ensure they fall within the 1.8 V to 3.6 V operational window.

Part Context

This component belongs to the C8051F70x/71x mixed-signal MCU family, which integrates standard 8051 functionality with advanced analog peripherals. The family shares a common instruction set and peripheral architecture, differing primarily in memory sizes and pin counts. The C8051F707 variant specifically offers 16 kB of Flash and is packaged in a 48-pin configuration, distinguishing it from larger 64-pin or smaller 32-pin counterparts in the same series.

Replacement Considerations

Direct substitutes within the same package and feature set are limited due to the 'Not Recommended for New Designs' status. Review the C8051F70x datasheet for alternative part numbers with compatible pinouts and electrical characteristics. Verify that any replacement maintains the required 48-pin QFN footprint and 1.8–3.6 V supply range.

FAQ

What is the maximum sampling rate of the onboard ADC?

The 10-bit Analog to Digital Converter (ADC0) supports a maximum sampling rate of up to 500 ksps.

How many input channels does the capacitance-to-digital converter support?

The capacitance-to-digital converter supports up to 38 input channels for sensing applications.

Is external emulator hardware required for debugging?

No, the device features on-chip debug circuitry that allows for full-speed, non-intrusive in-system debugging without an external emulator.