C8051F311-GM

Overview

The C8051F311-GM is an 8-bit microcontroller from the Silicon Labs C8051F31x family, featuring a high-speed CIP-51 core with up to 25 MIPS throughput at a 25 MHz clock frequency. It includes 16 kB of in-system programmable Flash memory and 1280 bytes of internal data RAM. The device operates within a supply voltage range of 2.7 V to 3.6 V and supports a temperature range of –40 °C to +85 °C. It is housed in a 28-pin QFN package.

Feature Summary

• Features a fully 8051-compatible CIP-51 core with pipelined architecture for improved instruction execution speed.
• Includes on-chip debug circuitry enabling full-speed, non-intrusive in-system debugging without external emulators.
• Provides hardware-enhanced serial communication interfaces including UART, SMBus, and SPI.
• Integrates two low-current comparators with programmable hysteresis and configurable interrupt or reset sources.

Applications

• Embedded systems requiring direct in-system programming via ISP
• Industrial control applications utilizing hardware serial ports
• Low-power designs leveraging stop mode current characteristics
• Sensor interfacing using built-in comparators and temperature sensors

Procurement Notes

Verify component authenticity through authorized distributors or official Silicon Labs channels. Confirm package marking matches the specified 28-pin QFN format. Check revision status as this series is marked Not Recommended for New Designs. Ensure environmental compliance documentation aligns with project requirements before finalizing procurement orders.

Selection Notes

Select this model when 16 kB Flash capacity and 28-pin QFN packaging are required. Choose over variants with 8 kB Flash if larger program storage is needed. Consider alternative packages like LQFP-32 if pin count or thermal performance differs from QFN-28 constraints. Verify peripheral availability such as ADC presence which varies across the F31x family.

Part Context

This component belongs to the C8051F31x series of mixed-signal microcontrollers. It shares the CIP-51 core architecture with siblings like the C8051F310 and C8051F312. Differences primarily involve Flash size and package type. The F311 specifically utilizes the 28-pin QFN form factor while retaining the 16 kB memory configuration found in other members of this specific subset.

Replacement Considerations

Public confirmed substitute part numbers: C8051F310-GM, C8051F312-GM, C8051F314-GM.