C8051F851-C-IU

Overview

The C8051F851-C-IU 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 4 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, and multiple communication peripherals including UART, I2C/SMBus, and SPI. It operates on a supply voltage of 2.2 V to 3.6 V and is housed in a 24-pin QSOP package.

Feature Summary

• High-Speed CIP-51 Core
• On-Chip Debug Circuitry
• 12-Bit Analog-to-Digital Converter
• General-Purpose I/O

Applications

• Industrial Control Systems
• Sensor Signal Processing
• Communication Interface Modules

Procurement Notes

Verify the specific suffix 'IU' against the manufacturer's current ordering guide to confirm the industrial temperature range (-40°C to +125°C) and package type (QSOP-24). Confirm RoHS compliance status for the specific revision. Check for any recent product change notices or errata sheets that may affect implementation details.

Selection Notes

Select this component when a low-cost 8-bit MCU with integrated analog peripherals is required. Ensure the 4 kB flash capacity meets application code size requirements. Verify that the 2.2 V to 3.6 V operating voltage aligns with the system power design. Consider the 24-pin QSOP package constraints for PCB layout.

Part Context

This part belongs to the C8051F85x/86x series, which offers up to 8 kB of flash memory. The C8051F851 variant specifically provides 4 kB of program memory. The family shares common peripheral sets but varies in memory size and pin count configurations across different package options like QFN and SOIC.

Replacement Considerations

Consult the official Silicon Labs replacement guide for verified substitutes. Generic 8051-compatible MCUs may not support the CIP-51 architecture or integrated debug features directly.