C8051F305-GMR

Overview

The C8051F305-GMR is a mixed-signal ISP Flash microcontroller from the Silicon Labs C8051F30x family. It features a high-speed 8051 core operating at up to 25 MHz with pipelined architecture delivering 25 MIPS throughput. The device includes 2 kB of in-system programmable Flash memory and 256 bytes of internal data RAM. Analog peripherals include a comparator with programmable hysteresis and response time, plus a built-in temperature sensor. Digital resources consist of hardware-enhanced UART and SMBus ports, three general-purpose 16-bit counter/timers, and a 16-bit Programmable Counter Array (PCA).

Feature Summary

• On-chip debug circuitry facilitates full speed, non-intrusive in-system debugging without requiring external emulation hardware.
• Integrated analog comparator supports configurable interrupt or reset generation with low current consumption.
• Hardware-enhanced serial communication interfaces provide efficient data transfer via UART and SMBus protocols.
• Flexible clock system allows on-the-fly switching between internal and external oscillators for power management.

Applications

• In-system programming applications requiring direct code updates
• Low-power embedded systems utilizing stop mode operation
• Industrial control loops using comparator-based monitoring
• Sensor interface designs leveraging integrated temperature sensing

Procurement Notes

Verify component status before procurement as this specific part number may be marked Not Recommended for New Designs. Confirm package availability matches design requirements, typically QFN-11 or SOIC-14. Ensure development tools support the C2 interface for programming. Check latest datasheet revisions for any assembly or sourcing changes that might affect long-term supply.

Selection Notes

Select this component when a fully static 8051 MCU with integrated debug is required. Compare against other C8051F30x variants based on Flash size and peripheral needs. Consider the 25 MHz maximum frequency for processing requirements. Evaluate power consumption specifications against application duty cycles. Verify voltage range compatibility with system power rails.

Part Context

This device belongs to the C8051F30x mixed-signal ISP Flash MCU family. It shares architectural similarities with siblings like the C8051F300 and F301 but differs in memory capacity and specific peripheral configurations. The family emphasizes single-chip solutions by integrating analog and digital functions alongside the CPU core.

Replacement Considerations

Check for newer Silicon Labs 8051 derivatives if new designs are planned. Review pin-compatible alternatives within the same package footprint. Verify software compatibility if migrating from older versions of the C8051F30x series.

FAQ

Does the C8051F305-GMR include an onboard ADC?

No, the C8051F305 does not include an onboard ADC. Only the C8051F300 and C8051F302 variants in this family feature an 8-bit ADC.

What is the maximum operating frequency of the C8051F305?

The maximum operating frequency is 25 MHz, which provides up to 25 MIPS throughput due to its pipelined instruction architecture.