C8051F855-C-GUR

Overview

The C8051F855-C-GUR is an 8-bit microcontroller from the Silicon Labs C8051F85x family, featuring a high-speed CIP-51 core operating at up to 25 MHz. It integrates 2 kB of in-system programmable Flash memory and 256 bytes of RAM within a 24-pin QSOP package. 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 supply voltage of 2.2 V to 3.6 V and supports commercial temperature ranges.

Feature Summary

• High-Speed CIP-51 Core: Pipelined architecture delivering up to 25 MIPS throughput using the standard 8051 instruction set.
• On-Chip Debug Circuitry: Facilitates full-speed, non-intrusive in-system debugging without requiring external emulators.
• Mixed-Signal Peripherals: Integrates a 12-bit ADC, two analog comparators, and multiple timer/counters for system control.
• Flexible I/O Architecture: Features up to 18 general-purpose I/O pins with 5 V tolerance and Crossbar-enabled routing.

Applications

• Industrial control systems
• Battery chargers
• Electronic toys and games
• Motor control applications

Procurement Notes

Verify component status as this model may be classified as Not Recommended for New Designs or End-of-Life. Confirm availability through authorized distributors and check for official replacement part numbers such as EFM8BB series devices if current stock is unavailable. Ensure datasheet revisions match design requirements.

Selection Notes

Select this MCU for designs requiring a cost-effective 8-bit solution with integrated analog peripherals. The CIP-51 core offers enhanced performance over traditional 8051 architectures. Consider the 24-pin QSOP package for prototyping or low-volume production where pin count and form factor align with board layout constraints.

Part Context

This component belongs to the C8051F85x/86x family of low-cost 8-bit MCUs. The family shares common architectural features including the CIP-51 core, on-chip debug capabilities, and mixed-signal integration. Variations within the family typically differ in Flash size, RAM capacity, and specific peripheral configurations while maintaining software compatibility.

Replacement Considerations

Silicon Labs suggests the EFM8BB51F8G-C-TSSOP20R as a potential alternative. Verify pinout compatibility and peripheral mapping before substitution, as architectural differences between C8051F and EFM8 families may require firmware adjustments.

FAQ

Does the C8051F855 support in-system programming?

Yes, the Flash memory is in-system programmable in 512-Byte sectors.

What is the maximum clock frequency for this device?

The system clock frequency can operate up to 25 MHz.

Is the device qualified for automotive applications?

The C8051F85x/86x family is qualified to AEC-Q100 standards.