C8051F304-GM

Overview

The C8051F304-GM is a mixed-signal ISP Flash microcontroller from Silicon Labs, featuring an 8-bit CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock. It integrates 4 kB of Flash program memory and 256 bytes of internal data RAM within a compact 11-pin QFN package (3x3 mm). The device operates on a supply voltage ranging from 2.7 V to 3.6 V across a 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.

Feature Summary

• Integrated high-speed 8051-compatible microcontroller core with pipelined architecture for efficient instruction execution.
• On-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Hardware-enhanced communication interfaces including UART and SMBus for reliable serial data transfer.
• Programmable digital I/O with crossbar logic allowing flexible pin configuration and 5 V tolerance.

Applications

• Embedded systems requiring low-power operation and compact form factors
• Industrial control applications utilizing serial communication protocols
• Battery-powered devices benefiting from low standby current modes
• Cost-sensitive embedded solutions needing integrated analog and digital peripherals

Procurement Notes

Verify the component status before procurement as this part is designated Not Recommended for New Designs. Confirm that existing designs can accommodate end-of-life transitions or utilize available stock. Ensure compatibility with current firmware and hardware layouts if continuing production. Check for authorized distributors offering genuine Silicon Labs inventory to avoid counterfeit risks.

Selection Notes

Select this MCU for applications prioritizing small footprint and integrated debug capabilities over new feature sets. Consider its 5 V tolerant I/O for interfacing with legacy logic levels. Evaluate power consumption requirements against typical operating currents at various clock speeds. Assess whether the 4 kB Flash and 256 B RAM suffice for specific application code and data storage needs.

Part Context

This component belongs to the C8051F30x family of mixed-signal microcontrollers, which are highly integrated system-on-chip solutions. The family shares common architectural features such as the CIP-51 core and on-chip debug interface, differing primarily in memory sizes and peripheral configurations like ADC resolution.

Replacement Considerations

Silicon Labs recommends EFM32PG26B301F2048IL136 or EFR32PG26 Series 2 MCUs as replacements for similar C8051F parts. Verify functional equivalence and pin compatibility when migrating to these newer ARM-based alternatives.

FAQ

Does the C8051F304-GM include an onboard Analog-to-Digital Converter?

No, the C8051F304 variant does not include an ADC; this peripheral is only available on the C8051F300 and C8051F302 models within the same family.

What is the maximum clock frequency supported by this microcontroller?

The device supports a maximum system clock frequency of 25 MHz, achieving up to 25 MIPS throughput.