C8051F820-GMR

Overview

The C8051F820-GMR is a mixed-signal ISP Flash MCU from the C8051F80x-83x family, featuring a high-speed 8051 μC core with up to 25 MIPS throughput at a 25 MHz clock. It integrates 8 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. The device includes a capacitance-to-digital converter supporting up to 16 input channels for touch sensing, a 10-bit ADC with up to 500 ksps conversion rate, and a programmable comparator. Digital peripherals consist of hardware-enhanced UART, SMBus, SPI, three 16-bit timers, and a PCA with PWM functionality. It operates on a 1.8 V to 3.6 V supply within a -40 °C to +85 °C temperature range.

Feature Summary

• Integrates a capacitance-to-digital converter for buttons, sliders, wheels, and proximity sensing with auto-scan capabilities.
• Features a pipelined CIP-51 microcontroller core that executes 70% of instructions in one or two system clocks.
• Includes an on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Supports multiple clock sources including a 24.5 MHz internal oscillator and allows on-the-fly switching between sources.

Applications

• Capacitive touch sensing interfaces
• Low-voltage embedded control systems
• In-system programming applications

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm the specific package variant matches design requirements, as the GMR suffix indicates tape and reel packaging. Check for current lifecycle status, as this series may be marked Not Recommended for New Designs. Ensure environmental compliance documentation aligns with target market regulations before finalizing procurement orders.

Selection Notes

Select this model when capacitive sensing integration alongside standard analog conversion is required. The 8 kB Flash and 512-byte RAM configuration suits moderate complexity control tasks. Verify pin compatibility if replacing older QFN packages, as port assignments differ across the F80x-83x family. Consider power consumption profiles during active and sleep modes relative to the 1.8 V to 3.6 V operating range.

Part Context

This component belongs to the C8051F80x-83x Mixed Signal ISP Flash MCU family by Silicon Labs. The family provides highly integrated solutions combining processing, analog, and digital peripherals on a single chip. The C8051F820 variant specifically targets applications needing capacitive touch capabilities alongside standard serial communication and timing functions.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided datasheet. Consult Silicon Labs for current recommended replacements due to the 'Not Recommended for New Designs' status.