C8051F304-GS

Overview

The C8051F304-GS is a mixed-signal ISP Flash MCU from Silicon Labs, featuring an 8051-compatible core with up to 25 MHz throughput. It includes 4 kB of 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 temperatures from -40 °C to +85 °C. It provides 8 Port I/O pins that are 5 V tolerant. Digital peripherals include hardware-enhanced UART and SMBus serial ports, three general-purpose 16-bit counter/timers, and a 16-bit programmable counter array (PCA). Clock sources include an internal oscillator at 24.5 MHz with ±2% accuracy or external options.

Feature Summary

• On-chip debug circuitry facilitates full-speed, non-intrusive in-system debugging without requiring external emulation hardware.
• Hardware-enhanced UART and SMBus serial ports provide efficient communication capabilities.
• Integrated comparator offers programmable hysteresis and response time for signal monitoring.
• Internal oscillator supports USB operation with high accuracy.

Applications

• Portable medical equipment
• Weigh scales
• Test equipment

Procurement Notes

Verify the component status before procurement as the datasheet indicates this family is Not Recommended for New Designs. Confirm package availability matches the specific suffix requirements. Ensure design reviews account for the end-of-life status if applicable. Cross-reference official documentation for any recent manufacturing changes.

Selection Notes

Select this model when a highly integrated mixed-signal solution with an 8051 core is required. It is suitable for applications needing 4 kB of Flash and 256 bytes of RAM. Consider the 5 V tolerant I/O for interfacing with higher voltage logic levels. Evaluate the available digital peripherals against system communication needs.

Part Context

This part belongs to the C8051F30x series of mixed-signal ISP Flash MCUs. The series shares common architectural features such as the CIP-51 microcontroller core and on-chip debug capabilities. Variations within the family differ primarily in memory size and analog peripheral configurations.

Replacement Considerations

Silicon Labs recommends the EFM32PG26B301F2048IL136 as a replacement for related parts in this family. Verify functional compatibility and pinout differences before substitution.

FAQ

Does the C8051F304 have an onboard ADC?

No, the C8051F304 does not include an onboard ADC; only the C8051F300 and C8051F302 models feature an 8-bit ADC.

What is the maximum clock frequency?

The maximum clock frequency is 25 MHz, providing up to 25 MIPS throughput.