C8051F305-GSR

Overview

The C8051F305-GSR is a mixed-signal ISP Flash MCU from Silicon Labs, featuring a high-speed 8051 microcontroller core with up to 25 MIPS throughput at a 25 MHz clock frequency. It integrates 2 kB of in-system programmable flash memory and 256 bytes of internal data RAM. The device operates on a supply voltage ranging from 2.7 V to 3.6 V and supports an industrial temperature range of –40 °C to +85 °C. Digital peripherals include eight 5 V tolerant I/O pins, hardware-enhanced UART and SMBus serial ports, three general-purpose 16-bit counter/timers, and a 16-bit programmable counter array (PCA) with capture/compare modules.

Feature Summary

• On-chip debug circuitry enables full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• Integrated analog comparator provides configurable hysteresis and response time, supporting interrupt or reset generation.
• Flexible clock sources allow switching between internal oscillators and external crystals, RC, or capacitors on-the-fly.
• Flash memory supports in-circuit programming for field upgrades and serves as non-volatile data storage.

Applications

• Infrared remote control systems
• Battery-powered sensor nodes
• Simple serial communication interfaces

Procurement Notes

Verify the specific package variant against the datasheet, as the suffix indicates tape-and-reel packaging. Confirm that the component meets RoHS compliance requirements if applicable to your manufacturing process. Ensure the operating voltage and temperature ranges align with your system specifications before finalizing procurement.

Selection Notes

Select this model when a compact solution with minimal I/O and limited program memory is required. It is suitable for applications where cost and space are critical constraints. Consider alternative models within the family if higher flash capacity, additional ADC channels, or different pin counts are necessary for the design.

Part Context

This component belongs to the C8051F30x series of mixed-signal MCUs. The series offers various configurations differing primarily in flash memory size and peripheral availability. The C8051F305 represents the entry-level option with 2 kB of flash, designed for basic control tasks.

Replacement Considerations

Direct replacements include other members of the C8051F30x family such as the C8051F300, C8051F301, C8051F302, C8051F303, and C8051F304, provided their memory and peripheral configurations meet the application requirements.