C8051F855-C-IMR

Overview

The C8051F855-C-IMR is an 8-bit microcontroller from the Silicon Labs C8051F85x family, featuring a high-speed CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock. 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 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-Speed CIP-51 Core
• On-Chip Debug Circuitry
• 12-Bit Analog-to-Digital Converter
• General-Purpose I/O

Applications

• Industrial Control Systems
• Medical Devices
• Smart Meters

Procurement Notes

Verify the specific suffix 'C' for commercial temperature grade and 'IMR' for QFN-20 tape-and-reel packaging against official ordering guides. Confirm current status as Not Recommended for New Designs (NRND) before finalizing procurement plans. Ensure compatibility with existing design infrastructure given the lifecycle status.

Selection Notes

Select this component when a low-cost 8-bit MCU with integrated analog peripherals is required. The CIP-51 core offers standard 8051 instruction set compatibility with enhanced performance. Consider the 2 kB Flash limit and 256 Bytes RAM capacity against application requirements. Verify that the 2.2 V to 3.6 V operating voltage aligns with system power rails.

Part Context

This part belongs to the C8051F85x/86x family of low-cost 8-bit MCUs. These devices are designed for applications requiring mixed-signal capabilities without external components. The family shares architectural similarities but varies in memory size and peripheral counts. The C8051F855 variant specifically provides 2 kB Flash and 256 Bytes RAM.

Replacement Considerations

Public confirmed substitute part numbers: None identified.