C8051F303-GMR

Overview

The C8051F303-GMR is a mixed-signal ISP Flash MCU from Silicon Labs, featuring an 8-bit CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock. It includes 8 kB of in-system programmable Flash memory and 256 bytes of internal data RAM. The device operates on a supply voltage of 2.7 V to 3.6 V and supports temperatures from –40 °C to +85 °C. It integrates hardware-enhanced UART and SMBus ports, three 16-bit timers, and a Programmable Counter Array. Available in 11-pin QFN or 14-pin SOIC packages.

Feature Summary

• Features a high-speed pipelined 8051-compatible microcontroller core capable of executing 70% of instructions in one or two system clocks.
• Includes on-chip debug circuitry for full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• Integrates a programmable digital I/O crossbar that allows flexible mapping of internal digital resources to physical pins via software configuration.
• Supports real-time clock modes using the PCA or timer with an external clock source.

Applications

• Infrared remote control systems
• Consumer electronics devices
• Motor control applications
• Industrial equipment monitoring

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package type matches design requirements, as options include 11-pin QFN and 14-pin SOIC. Check datasheet revision history for updates regarding electrical characteristics or pin definitions before finalizing procurement specifications.

Selection Notes

Select this model when 8 kB of Flash memory and 256 bytes of RAM are sufficient for application logic. Ensure compatibility with 2.7 V to 3.6 V power rails. Consider the 11-pin QFN or 14-pin SOIC footprint based on PCB layout constraints. Verify that the absence of an integrated ADC meets signal processing needs, as this variant lacks analog-to-digital conversion capabilities.

Part Context

This component belongs to the C8051F30x family of mixed-signal ISPs Flash MCUs. The family shares a common architecture but varies in memory size and peripheral integration. The C8051F303 specifically provides 8 kB of Flash, distinguishing it from smaller variants like the C8051F304 (4 kB) while maintaining identical core performance and peripheral sets within the series.

Replacement Considerations

Consult official documentation for confirmed substitute part numbers. Cross-referencing requires matching core architecture, memory capacity, and package dimensions to ensure functional equivalence in existing designs.