C8051F305

Overview

The C8051F305-GM is an 8-bit mixed-signal microcontroller from Silicon Labs, featuring a high-speed CIP-51 core operating at up to 25 MHz. It integrates 2 kB of Flash memory and 256 bytes of internal data RAM. The device supports supply voltages between 2.7 V and 3.6 V and operates within a temperature range of –40 °C to +85 °C. Available in 11-pin QFN (3x3 mm) or 14-pin SOIC packages, it includes hardware-enhanced UART and SMBus ports, three general-purpose 16-bit timers, and a 16-bit Programmable Counter Array.

Feature Summary

• Integrated on-chip debug circuitry enables full-speed, non-intrusive in-system debugging without external emulators.
• Hardware-enhanced serial communication interfaces include UART and SMBus for reliable data transfer.
• Programmable digital crossbar allows flexible configuration of peripheral pins to port I/O lines.

Applications

• Embedded systems requiring compact mixed-signal processing
• Industrial control applications with limited pin count requirements
• Portable instrumentation utilizing low-power operation modes

Procurement Notes

Verify the specific package variant required, as the component is available in both 11-pin QFN and 14-pin SOIC configurations. Confirm that the design accommodates the 'Not Recommended for New Designs' status indicated in official documentation. Ensure compatibility with existing firmware architectures targeting the C8051F30x family before procurement.

Selection Notes

Select this component when a small form factor is critical due to its minimal pin count options. It is suitable for designs needing basic analog peripherals like comparators and temperature sensors without the complexity of higher-end ADCs found in other family members. Consider power consumption profiles, noting typical active current at specified clock speeds.

Part Context

This part belongs to the C8051F30x series of mixed-signal ISP Flash MCUs. The series is characterized by fully static operation and high integration levels within a single chip architecture. These devices are designed to reduce system component count by combining microcontroller cores with essential analog and digital peripherals.

Replacement Considerations

Officially documented substitutes within the same datasheet include C8051F300, C8051F301, C8051F302, C8051F303, and C8051F304. Differences primarily involve variations in Flash memory size and the presence or absence of specific analog peripherals such as the 8-bit ADC.