C8051F861-C-ISR

Overview

The C8051F861-C-ISR is an 8-bit microcontroller from the Silicon Labs C8051F85x/86x family, featuring a high-speed CIP-51 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 RAM. The device includes a 12-bit ADC with up to 16 input channels, two analog comparators, four 16-bit timers, and a Programmable Counter Array. Communication interfaces include UART, I2C/SMBus, and SPI. It operates on a 2.2 to 3.6 V supply and is available in a 16-pin SOIC package.

Feature Summary

• High-performance pipelined CIP-51 core compatible with standard 8051 instruction sets
• Integrated 12-bit Analog-to-Digital Converter supporting multiple input channels
• On-chip debug circuitry enabling non-intrusive system debugging without external emulators
• Flexible I/O architecture with crossbar-enabled pins and 5 V tolerance

Applications

• Industrial control systems requiring mixed-signal processing
• Embedded sensor interface designs utilizing ADC and comparator peripherals
• Communication gateway applications leveraging UART and SMBus capabilities
• Battery-powered devices benefiting from low-power operational modes

Procurement Notes

Verify the specific suffix -ISR against the manufacturer's current documentation to confirm package type and temperature range specifications. Confirm whether the component is designated as Not Recommended for New Designs (NRND) prior to finalizing procurement plans. Ensure compatibility with existing design tools and development environments supported by the Silicon Labs 8-bit Microcontroller Studio.

Selection Notes

Select this model when a cost-effective 8-bit solution with integrated analog peripherals is required. The CIP-51 core offers enhanced performance over traditional 8051 architectures while maintaining software compatibility. Consider the 16-pin SOIC package for space-constrained PCB layouts. Evaluate power consumption requirements across different operating frequencies and voltage levels to ensure compliance with system energy constraints.

Part Context

This component belongs to the C8051F85x/86x series, which provides a low-cost entry point into Silicon Labs' mixed-signal microcontroller portfolio. The series emphasizes high integration by combining digital processing with essential analog functions on a single chip. This approach reduces external component count and simplifies board design for embedded applications.

Replacement Considerations

Consult official Silicon Labs documentation for qualified substitute part numbers within the same family or alternative series. Verify pinout compatibility and peripheral feature parity before implementing any replacement. Note that ordering suffixes may indicate variations in package or temperature rating that affect interchangeability.