C8051F303R

Overview

The C8051F303R is an 8-bit mixed-signal ISP Flash MCU from Silicon Labs, part of the C8051F30x family. It features a high-speed CIP-51 microcontroller core operating at up to 25 MHz with 25 MIPS throughput. The device includes 8 kB of in-system programmable Flash memory and 256 bytes of internal data RAM. Key peripherals include a hardware-enhanced UART, SMBus serial port, three general-purpose 16-bit counter/timers, and a 16-bit Programmable Counter Array (PCA). It operates on a supply voltage of 2.7 V to 3.6 V and supports temperatures from –40 °C to +85 °C.

Feature Summary

• Integrated on-chip debug circuitry enables full-speed, non-intrusive in-system debugging without external emulators.
• Features a pipelined instruction architecture that executes 70% of instructions in one or two system clocks for improved throughput.
• Includes hardware-enhanced UART and SMBus serial ports alongside multiple timer and counter resources.

Applications

• Embedded control systems requiring in-system programming capabilities
• Industrial monitoring applications utilizing onboard temperature sensors
• Low-power portable devices operating within specified voltage ranges

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package type matches design requirements, as this model is available in QFN and SOIC variants. Check current lifecycle status, as the datasheet indicates this family is not recommended for new designs. Ensure compliance with relevant environmental regulations before integration into final products.

Selection Notes

Select this component when a fully 8051-compatible core with high execution speed is required. Consider the C8051F303R for designs needing integrated analog peripherals like comparators and ADCs. Evaluate power consumption specifications against application needs, noting typical operating currents at various clock speeds. Ensure software development tools support the specific CIP-51 architecture and debug interfaces provided by the silicon.

Part Context

This microcontroller belongs to the C8051F30x series, which are mixed-signal ISP Flash MCUs designed for high performance and low cost. The series integrates a fast 8051 core with extensive digital and analog peripherals on a single chip. This specific variant offers 8 kB of Flash memory, distinguishing it from other members of the family with different storage capacities.

Replacement Considerations

Consult official Silicon Labs documentation for verified substitute part numbers within the C8051F30x family or compatible successors. Verify pin compatibility and peripheral availability before transitioning to alternative components.