C8051F704-GQR

Overview

The C8051F704-GQR is a mixed-signal ISP Flash MCU from the Silicon Labs C8051F70x family, housed in a 48-pin TQFP package. It features a high-speed pipelined 8051 core delivering up to 25 MIPS at 25 MHz. The device integrates 16 kB of in-system programmable Flash memory, 512 bytes of internal data RAM, and 32 bytes of data EEPROM. Key analog peripherals include a 10-bit ADC supporting up to 500 ksps with up to 16 external single-ended inputs, a Capacitance to Digital Converter for sensing applications, and an analog comparator. Supply voltage ranges from 1.8 V to 3.6 V.

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 debug without requiring external emulation hardware.
• High-speed 8051 microcontroller core utilizes a pipelined instruction architecture to execute 70% of instructions in one or two system clocks.
• Digital peripherals include hardware-enhanced UART, SMBus compatible interfaces, enhanced SPI serial ports, and a 16-bit programmable counter array.

Applications

• Capacitive sensing interfaces such as touch screens, proximity detection, and slider controls
• Data acquisition systems utilizing the high-speed 10-bit ADC
• Embedded control applications requiring in-system programming and debugging

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm that the specific part number matches the required package variant and temperature rating. Review the official datasheet for absolute maximum ratings and electrical characteristics prior to integration. Ensure compliance with RoHS directives and environmental specifications relevant to the target deployment environment.

Selection Notes

Select this component when a fully integrated mixed-signal solution with on-chip debug and capacitive sensing is required. Evaluate the 16 kB Flash capacity against application code size requirements. Consider the 1.8 V to 3.6 V supply range for power budget constraints. Verify that the 48-pin TQFP package fits the available PCB real estate and thermal management strategy.

Part Context

This device belongs to the C8051F70x/71x family of mixed-signal ISP Flash MCUs manufactured by Silicon Laboratories. The family shares a common architectural foundation featuring the CIP-51 core and extensive peripheral sets. The C8051F704 variant specifically offers 16 kB of Flash memory within the 48-pin form factor.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's discontinuation notices for potential next-generation alternatives within the same product family.

FAQ

What is the maximum sampling rate of the integrated ADC?

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

Does the device support in-system programming?

Yes, the device includes up to 16 kB of Flash memory that is in-system programmable in 512-byte sectors.

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.