C8051F704-GM

Overview

The C8051F704-GM is a mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F70x family, housed in a 48-pin QFN package. It features a high-speed pipelined 8051 core operating at up to 25 MHz with 25 MIPS throughput. 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, a capacitive sense module with up to 38 input channels, and an analog comparator. Digital interfaces encompass UART, SMBus, and SPI.

Feature Summary

• Capacitive Sense Module supports buttons, sliders, wheels, proximity sensing, and touch screens with auto-scan capabilities.
• On-Chip Debug circuitry enables full-speed, non-intrusive in-system debugging without external emulators.
• High-Speed 8051 Core utilizes a pipelined architecture executing most instructions in one or two system clocks.
• Flexible Clock Sources allow switching between a precision internal oscillator and external crystals or RC circuits.

Applications

• Capacitive touch sensing applications
• Portable medical equipment
• Weigh scales
• Embedded modems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package type. Check for current lifecycle status as this family may be marked Not Recommended for New Designs. Ensure environmental ratings align with operational requirements.

Selection Notes

Select this MCU for designs requiring integrated capacitive sensing alongside standard mixed-signal processing. Evaluate pin count and peripheral availability against the specific application needs. Consider the 48-pin QFN footprint for space-constrained layouts. Verify voltage supply compatibility within the specified range.

Part Context

This component belongs to the C8051F70x/71x series of highly integrated mixed-signal microcontrollers. These devices are designed for cost-sensitive applications demanding USB connectivity and high-performance analog processing. The family targets markets such as medical diagnostics, point-of-sale terminals, and VoIP telephones.

Replacement Considerations

Silicon Labs recommends EFM32PG26B301F2048IL136 or EFR32PG26 Series 2 MCUs as replacements for legacy C8051F parts.

FAQ

What is the maximum conversion rate of the integrated ADC?

The 10-bit Analog to Digital Converter supports sampling rates of up to 500 ksps.

How many input channels does the Capacitive Sense module support?

The Capacitive Sense module supports up to 38 input channels for sensing applications.

Is external debug hardware required for programming?

No, the device includes on-chip debug circuitry that facilitates full-speed, non-intrusive in-system debugging without an emulator.