C8051F851-C-GUR

Overview

The C8051F851-C-GUR is an 8-bit microcontroller from Silicon Labs, part of the C8051F85x/86x family. It features a high-speed CIP-51 core operating at up to 25 MHz (25 MIPS). The device includes 4 kB of in-system programmable Flash memory and 512 bytes of RAM. Key peripherals include a 12-bit ADC with up to 16 channels, two analog comparators, four 16-bit timers, a Programmable Counter Array, UART, I2C/SMBus, and SPI interfaces. 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-performance CIP-51 core with pipelined architecture for efficient instruction execution
• Integrated mixed-signal capabilities including 12-bit ADC and analog comparators
• Comprehensive digital communication interfaces supporting UART, I2C/SMBus, and SPI
• On-chip debug circuitry enabling full-speed, non-intrusive system debugging

Applications

• Battery chargers
• Electronic toys and games
• Motor control systems
• Optical communications equipment

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific lot traceability requirements. Ensure storage conditions adhere to moisture sensitivity level guidelines prior to reflow soldering. Validate that the procurement source provides original datasheets and quality certifications matching the specified part number.

Selection Notes

Select this MCU for applications requiring low-cost 8-bit processing with integrated analog functions. Consider the 24-pin QSOP package for prototyping or low-volume production where space constraints are moderate. Evaluate the 4 kB Flash limit against application code size requirements. Verify peripheral compatibility with existing system interfaces before finalizing the design choice.

Part Context

This component belongs to the C8051F85x/86x series of low-cost 8-bit MCUs. The series is characterized by high integration, combining a standard 8051-compatible core with significant on-chip resources. These devices are designed to reduce external component count and simplify system design for embedded control applications.

Replacement Considerations

Public confirmed substitute part numbers: EFM8BB51F8G-C-TSSOP20R.