C8051F821-GSR

Overview

The C8051F821-GSR is an 8-bit mixed-signal ISP Flash microcontroller from the C8051F80x-83x family, featuring a high-speed pipelined 8051 core with up to 25 MIPS throughput at a 25 MHz clock. It integrates 16 kB of in-system programmable Flash memory and 512 bytes of internal data RAM. Key peripherals include a 10-bit ADC supporting up to 500 ksps, a capacitive sense module with 16 input channels, and multiple digital interfaces such as UART, SMBus, and SPI. The device operates on a supply voltage range of 1.8 V to 3.6 V and is available in a 16-pin SOIC package.

Feature Summary

• Integrated capacitive sense module 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 most instructions in one or two system clocks
• Mixed-signal integration including a 10-bit ADC, comparators, and temperature sensor for analog applications

Applications

• Capacitive touch interface implementations for user controls
• Embedded systems requiring direct USB connectivity via host software solutions
• Portable devices utilizing low-voltage operation and integrated power management
• Industrial control applications using hardware-enhanced serial communication ports

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm that the specific ordering suffix matches the required package type and temperature rating. Review the official datasheet for any recent process change notices or end-of-life notifications associated with this product line before finalizing procurement plans.

Selection Notes

Select this component when a design requires a fully integrated mixed-signal solution with capacitive sensing capabilities. Ensure the application fits within the 1.8 V to 3.6 V supply voltage range and utilizes the available 16 kB of program memory. Consider the 16-pin SOIC package constraints regarding pin count and thermal performance for the target environment.

Part Context

This microcontroller belongs to the C8051F80x-83x series, which provides a comprehensive set of on-chip resources for embedded control tasks. The family is characterized by its ISP Flash technology and extensive analog peripheral integration, designed to reduce external component counts in compact electronic designs.

Replacement Considerations

Consult the official product selection guide for compatible alternatives within the same family. Verify pin compatibility and peripheral availability when evaluating substitute part numbers.