C8051F705-GQR

Overview

The C8051F705-GQR is a mixed-signal ISP Flash MCU from the C8051F70x/71x family by Silicon Labs. It features an 8051 core with up to 25 MIPS throughput at 25 MHz, 16 kB of in-system programmable Flash memory, and 512 bytes of internal data RAM. The device integrates a 10-bit ADC supporting up to 500 ksps, a capacitance-to-digital converter for capacitive sensing, and a voltage comparator. It operates on a supply voltage range of 1.8 V to 3.6 V and is housed in a 64-pin TQFP package.

Feature Summary

• Integrates a high-speed pipelined 8051 microcontroller core capable of executing 70% of instructions in one or two system clocks.
• Includes a capacitance-to-digital converter supporting up to 38 input channels for buttons, sliders, and touch screen sensing.
• Features a 10-bit analog-to-digital converter with sampling rates up to 500 ksps and multiple reference options.
• Provides on-chip debug circuitry for full-speed, non-intrusive in-system debugging without requiring external emulators.

Applications

• Capacitive sensing interfaces such as buttons, sliders, wheels, and proximity detection
• Mixed-signal control systems requiring integrated analog-to-digital conversion
• Low-voltage embedded applications operating within 1.8 V to 3.6 V supply ranges

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm that the specific part number matches the required package type and temperature rating. Check for current availability status as this series may be subject to discontinuation notices. Ensure compliance with relevant RoHS directives and environmental regulations applicable to your region before procurement.

Selection Notes

Select this component when a mixed-signal solution combining digital control with capacitive sensing and analog acquisition is required. Consider the 16 kB Flash capacity and 512-byte RAM limits against application memory needs. Evaluate the 64-pin TQFP package constraints regarding PCB space and pin count requirements relative to other available packages in the F70x family.

Part Context

This component belongs to the C8051F70x/71x family of fully integrated mixed-signal system-on-chip MCUs manufactured by Silicon Labs. These devices are designed to provide complete solutions for applications needing both digital processing and analog signal conditioning capabilities within a single compact package architecture.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers within the same product family. Verify functional compatibility and pinout alignment before considering alternative models.

FAQ

What is the maximum sampling rate of the integrated ADC?

The integrated 10-bit analog-to-digital converter supports sampling rates 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 various sensing applications.

Is external debugging hardware required for in-system programming?

No, the device includes on-chip debug circuitry that facilitates full-speed, non-intrusive in-system debugging without the need for external emulators.