C8051F851-C-GMR

Overview

The C8051F851-C-GMR is an 8-bit mixed-signal microcontroller from the Silicon Labs C8051F85x/86x family. It features a high-speed CIP-51 core operating at up to 25 MHz, providing efficient pipelined instruction execution. The device integrates 4 kB of in-system programmable Flash memory and 512 bytes of RAM. Key peripherals include a 12-bit ADC with up to 16 input channels, two analog comparators, four 16-bit timers, and communication interfaces such as UART, SPI, and I2C/SMBus. It operates within a supply voltage range of 2.2 V to 3.6 V and is available in a 24-pin QSOP package.

Feature Summary

• High-performance CIP-51 core with standard 8051 instruction set compatibility
• Integrated 12-bit ADC supporting multiple input channels and reference options
• On-chip debug circuitry enabling full-speed non-intrusive system debugging
• Flexible general-purpose I/O with 5 V tolerance and crossbar routing

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific ordering suffix matches the required package and temperature grade. Check for Not Recommended for New Designs status in current project planning. Ensure ESD handling protocols are followed during storage and assembly. Validate pinout compatibility with existing PCB layouts before procurement.

Selection Notes

Select this model when 4 kB of Flash memory suffices for application firmware requirements. Choose the C-GMR variant specifically for the 24-pin QSOP surface-mount package configuration. Consider the -Gx temperature rating if the operational environment remains within commercial limits. Evaluate peripheral needs against the integrated ADC and timer counts to ensure sufficient resources without over-specifying.

Part Context

This component belongs to the C8051F85x/86x low-cost 8-bit MCU family designed for highly integrated mixed-signal applications. The series emphasizes stand-alone system-on-chip solutions by combining digital processing with analog capabilities. It targets cost-sensitive markets requiring robust performance in compact form factors. The family shares common architectural features while varying in memory size and package options.

Replacement Considerations

Public confirmed substitute part numbers: None identified.