C8051F346-GQ

Overview

The C8051F346-GQ is an 8-bit microcontroller from the Silicon Labs C8051F34x family, featuring a high-speed pipelined 8051 core operating at 25 MIPS. It integrates 32 kB of in-system programmable Flash memory and 2304 bytes of RAM. The device includes a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery, eliminating the need for external components. Analog peripherals consist of a 10-bit ADC with up to 200 ksps sampling rate, two comparators, and a temperature sensor. Digital interfaces include SPI, SMBus, and UARTs. It operates within a voltage range of 2.7 V to 5.25 V and supports a commercial temperature range of -40 °C to +85 °C.

Feature Summary

• Integrates a full-speed USB 2.0 function controller with an on-chip transceiver and clock recovery circuitry.
• Features a high-performance 8051-compatible CPU with pipelined architecture for efficient instruction execution.
• Includes mixed-signal capabilities such as a 10-bit ADC, analog comparators, and an internal temperature sensor.
• Provides comprehensive digital communication interfaces including SPI, SMBus, and enhanced UARTs.

Applications

• PC peripherals requiring USB connectivity
• Point-of-sale (POS) terminals
• Embedded modems
• Voice over Internet Protocol (VoIP) telephones

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package type. Check current lifecycle status as this family may be marked not recommended for new designs. Ensure environmental compliance documentation aligns with project requirements.

Selection Notes

Select this model when a cost-effective solution with integrated USB functionality is required alongside moderate processing power. Compare memory sizes against other variants in the F34x series to ensure sufficient Flash and RAM capacity. Verify that the 25 MIPS performance meets real-time control demands. Consider the LQFP-32 package constraints for PCB layout.

Part Context

This component belongs to the C8051F34x Full Speed USB Flash MCU family by Silicon Laboratories. The family shares a common architecture but varies in memory size, I/O count, and package options. The C8051F346 variant specifically offers 32 kB Flash and 2304 bytes RAM in a 32-pin LQFP package, distinguishing it from higher-capacity models like the C8051F340.

Replacement Considerations

Consult the official datasheet for pin-compatible alternatives within the same family. Verify functional equivalence regarding USB controller features and memory specifications before substitution.