C8051F347-GMR

Overview

The C8051F347-GMR is an 8-bit microcontroller from Silicon Labs, part of the C8051F34x family. It features a high-speed pipelined 8051-compatible core operating at up to 25 MIPS. The device integrates 32 kB of in-system programmable Flash memory and 2.25 kB of RAM. Key peripherals include a 10-bit ADC with up to 200 ksps sampling rate, two comparators, and a full-speed USB 2.0 function controller with integrated transceiver and clock recovery. It offers 25 I/O pins, multiple digital communication interfaces including SPI, SMBus, and UARTs, and operates within a voltage range of 2.7 V to 5.25 V using an on-chip regulator.

Feature Summary

• Integrates a full-speed USB 2.0 function controller with an on-chip transceiver and clock recovery circuitry, eliminating the need for external components.
• Features a high-performance pipelined 8051 core capable of executing instructions in one or two system clocks for enhanced processing speed.
• Includes a versatile analog subsystem with a multi-channel 10-bit ADC, internal voltage reference, and temperature sensor.
• Provides flexible peripheral configuration through a programmable digital crossbar and supports non-intrusive in-system debugging via the C2 interface.

Applications

• PC peripherals requiring USB connectivity
• Point-of-sale (POS) terminals
• Medical diagnostic equipment
• Embedded modems

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm package type matches LQFP-32 requirements. Ensure design compliance with RoHS directives as indicated in product documentation. Review lifecycle status carefully, as this series may be marked Not Recommended for New Designs. Validate supply chain sources to avoid counterfeit parts.

Selection Notes

Select this MCU when a cost-effective solution with integrated USB functionality is required without external PHY components. Consider the 32 kB Flash size for firmware constraints and verify that the 25 MHz core speed meets real-time processing needs. Check pin count compatibility with the 25 available I/O lines and ensure the 2.7 V to 5.25 V operating range aligns with system power rails.

Part Context

This component belongs to the C8051F34x Full Speed Flash MCU family from Silicon Labs. These devices are designed as mixed-signal System-on-Chip solutions targeting applications needing USB integration. The family shares common architectural features like the CIP-51 core and USB controller, differing primarily in memory sizes and package options.

Replacement Considerations

Public confirmed substitute part numbers: C8051F346, C8051F349, C8051F34A, C8051F34B, C8051F34D.