C8051F817-GS

Overview

The C8051F817-GS is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F80x-83x family, featuring a high-speed 8051 core with up to 25 MIPS throughput at a 25 MHz clock frequency. It integrates 16 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. The device includes a 10-bit ADC supporting up to 500 ksps conversion rates, a capacitance-to-digital converter for sensing applications, and multiple digital peripherals including UART, SMBus, and SPI. Operating within a supply voltage range of 1.8 V to 3.6 V, it supports industrial temperatures from -40°C to +85°C and is available in a 16-pin SOIC package.

Feature Summary

• Integrated capacitance-to-digital converter supporting buttons, sliders, wheels, and capacitive proximity sensing with auto-scan capabilities.
• High-speed pipelined 8051 core executing 70% of instructions in one or two system clocks for efficient processing.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Comprehensive analog peripherals including a 10-bit ADC, programmable comparators, and a built-in temperature sensor.

Applications

• Capacitive touch interface implementations requiring proximity sensing and slider controls
• Mixed-signal data acquisition systems utilizing the integrated 10-bit ADC and temperature sensor
• Industrial control devices operating in extended temperature environments
• Embedded systems requiring in-system programming and field upgrades via Flash memory

Procurement Notes

Verify component authenticity through authorized distributors as this part is marked Not Recommended for New Designs. Confirm package integrity upon receipt, specifically checking for damage to the 16-SOIC housing. Review the latest Product Change Notice (PCN) and End-of-Life documentation for any manufacturing updates or discontinuance schedules affecting long-term supply stability.

Selection Notes

Select this component when a standalone 8-bit MCU with integrated capacitive sensing and analog conversion is required. Ensure design compatibility with the 1.8 V to 3.6 V supply range and verify that the 16-pin SOIC footprint meets board space constraints. Consider the 25 MHz maximum clock speed and 16 kB Flash capacity against application software requirements before finalizing the selection.

Part Context

The C8051F817-GS belongs to the C8051F80x-83x series of mixed-signal ISP Flash MCUs by Silicon Laboratories. This family emphasizes high integration by combining a fast 8051 core with extensive analog and digital peripherals on a single chip. The series is designed for cost-sensitive applications needing robust connectivity and sensing capabilities without external components.

Replacement Considerations

Silicon Labs recommends EFM8BB31F64G-QFN32 as a replacement for this discontinued part number. Verify pinout compatibility and software migration efforts when transitioning to the EFM8 Busy Bee family.

FAQ

What is the maximum sampling rate of the onboard ADC?

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

Does the C8051F817-GS support capacitive sensing?

Yes, it features a dedicated Capacitance-to-Digital Converter (CS0) that supports buttons, sliders, wheels, and capacitive proximity sensing with auto-scan functionality.

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 the need for external emulators or ICE-chips.