C8051F865-C-GSR

Overview

The C8051F865-C-GSR is an 8-bit microcontroller from the Silicon Labs C8051F85x/86x family, utilizing a high-speed CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock frequency. It features 8 kB of in-system programmable Flash memory and 512 Bytes of RAM (256 + 256). The device includes a 12-bit ADC with up to 16 input channels, two analog comparators, and communication peripherals including UART, I2C/SMBus, and SPI. Operating within a supply voltage range of 2.2 V to 3.6 V, it supports industrial temperature ranges (-40°C to +125°C) and is housed in a 16-pin SOIC package.

Feature Summary

• High-performance CIP-51 core with pipelined architecture and standard 8051 instruction set compatibility
• Integrated mixed-signal capabilities featuring a 12-bit ADC, analog comparators, and on-chip debug circuitry
• Comprehensive peripheral set including multiple timers, PWM channels, and standard serial communication interfaces
• Robust system management with independent watchdog timer, power-on reset, and supply voltage monitor

Applications

• Industrial control systems requiring robust analog signal processing
• Battery-powered devices benefiting from low-power operating modes
• Motor control applications utilizing PCA PWM and hardware kill capabilities
• Embedded sensor nodes using integrated ADC and comparator functions

Procurement Notes

Verify the specific suffix 'GSR' against the manufacturer's current ordering guide to confirm package type and temperature grade. Confirm that the component status aligns with project requirements, as this series may be designated as not recommended for new designs. Ensure compatibility with existing PCB footprints for the 16-pin SOIC package. Cross-reference the unique identifier and revision details if traceability is required for quality assurance processes.

Selection Notes

Select this model when a cost-effective 8-bit solution with significant analog integration is required. The C8051F865 variant offers specific pin counts and peripheral configurations distinct from other members of the F85x/86x family. Consider the -Gx commercial temperature grade if operation outside -40°C to +85°C is not necessary. Evaluate the need for the specific 16-pin SOIC footprint versus QFN or QSOP options available in the same family.

Part Context

This component belongs to the C8051F85x/86x family of low-cost 8-bit MCUs designed for mixed-signal applications. The family shares a common architecture but varies in Flash size, RAM capacity, and peripheral availability. The C8051F865 specifically integrates 8 kB of Flash and a defined set of I/O and analog peripherals suitable for general-purpose embedded control tasks within the specified voltage and temperature constraints.

Replacement Considerations

Direct replacements within the same package and pinout must be verified via the official cross-reference list. Other members of the C8051F85x/86x family may serve as substitutes if peripheral differences are acceptable. Note that the entire family is marked as not recommended for new designs; consider migrating to newer Silicon Labs MCU families for long-term supply assurance.