C8051F855-C-IM

Overview

The C8051F855-C-IM 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. 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 V to 3.6 V supply within an industrial temperature range of -40°C to +125°C.

Feature Summary

• High-performance CIP-51 core delivering up to 25 MIPS throughput
• Integrated 12-bit ADC with multiple input channels and internal reference
• On-chip debug circuitry supporting non-intrusive system debugging
• Low-power operation with calibrated internal oscillators

Applications

• Industrial control systems requiring robust I/O and communication
• Battery-powered devices utilizing low-power modes
• Motor control applications using timer and PWM capabilities
• Sensor interface circuits leveraging analog peripherals

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches required package and temperature specifications. Check for Not Recommended for New Designs status in current documentation before finalizing procurement plans.

Selection Notes

Select this model when 2 kB Flash and 256 Bytes RAM are sufficient for application logic. Ensure compatibility with 2.2 V to 3.6 V power rails. Verify that the QSOP-24 package fits the board layout constraints. Consider alternative pinouts if more GPIOs are needed.

Part Context

This MCU belongs to the C8051F85x series, designed for cost-sensitive mixed-signal applications. It combines standard 8051 architecture with modern peripheral integration. The family emphasizes ease of development through comprehensive on-chip debug features and flexible clocking options.

Replacement Considerations

Consult official substitution guides for compatible parts within the same family. Verify pinout and register compatibility before replacing. Note that newer designs may require migration to updated product lines due to end-of-life status.