C8051F305R

Overview

The C8051F305R is an 8-bit mixed-signal ISP Flash MCU from Silicon Labs, 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 internal data RAM. The device includes hardware-enhanced UART and SMBus serial ports, 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 within a temperature range of –40 °C to +85 °C.

Feature Summary

• Features a fully 8051-compatible CIP-51 microcontroller core with pipelined architecture for improved throughput.
• Includes on-chip debug circuitry supporting full-speed, non-intrusive in-system debugging without external emulators.
• Integrates hardware-enhanced UART and SMBus serial communication interfaces.
• Provides a programmable digital I/O crossbar for flexible peripheral pin configuration.

Applications

• In-system programming applications requiring direct code updates
• Embedded systems utilizing UART or SMBus communication protocols
• Industrial control environments operating within standard commercial temperature ranges

Procurement Notes

Verify the specific suffix 'R' indicates tape and reel packaging when sourcing components. Confirm RoHS compliance status as datasheets may vary by production batch. Check for obsolescence notices, as this family is marked not recommended for new designs. Ensure the required package type matches the available inventory options.

Selection Notes

Select this component if a fully 8051-compatible architecture with integrated Flash and debug capabilities is required. Consider the limited 2 kB Flash size for smaller firmware requirements. Evaluate the 25 MHz maximum clock speed against processing needs. Verify that the 2.7 V to 3.6 V supply voltage range aligns with system power constraints.

Part Context

This part belongs to the C8051F30x series of mixed-signal MCUs. The series shares common peripherals like the PCA and timers but varies in Flash capacity and ADC resolution. The C8051F305 specifically offers lower memory capacity compared to other members in the F300-F304 lineup.

Replacement Considerations

Consult the manufacturer's product selection guide for alternative parts within the C8051F30x family. Verify pin compatibility and memory size differences before substituting with other variants in the same series.