C8051F805-GSR

Overview

The C8051F805-GSR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F80x-83x family, featuring a high-speed pipelined 8051 core operating at up to 25 MHz. It integrates 8 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. The device includes a 10-bit ADC with up to 500 ksps throughput, a capacitance-to-digital converter for capacitive sensing, and multiple digital peripherals including UART, SMBus, and SPI. It operates on a supply voltage of 1.8 V to 3.6 V within a temperature range of –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 proximity sensing with auto-scan capabilities
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators
• High-speed 8051 core with pipelined architecture executing 70% of instructions in one or two system clocks
• Flexible clock sources including a 24.5 MHz ±2% internal oscillator and support for external crystal, RC, or clock inputs

Applications

• Capacitive touch interface implementations requiring button, slider, or wheel detection
• Embedded systems utilizing in-system programming for field firmware upgrades
• Low-voltage portable devices requiring integrated analog-to-digital conversion and sensor interfacing

Procurement Notes

Verify component authenticity through authorized distributors as this part is marked Not Recommended for New Designs. Confirm package type matches design requirements, specifically the 16-pin SOIC variant for the GSR suffix. Check for end-of-life notifications or product change notices prior to final procurement decisions.

Selection Notes

Select this MCU when a compact 8-bit solution with integrated capacitive sensing and analog peripherals is required. Ensure design constraints align with the 1.8 V to 3.6 V supply range and 25 MHz maximum clock speed. Consider the 16-pin SOIC package availability if board space is limited compared to QFN or QSOP options.

Part Context

This component belongs to the C8051F80x-83x mixed-signal ISP Flash MCU family by Silicon Labs. The family shares common architectural features including the CIP-51 core, crossbar logic, and extensive analog integration. Variants within the series differ primarily in Flash size, I/O count, and peripheral configurations while maintaining pin compatibility across specific package types.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.