C8051F349-GQ

Overview

The C8051F349-GQ is a mixed-signal System-on-Chip microcontroller from the C8051F34x family, manufactured by Silicon Labs. It features a high-speed 8051-compatible core operating at 25 MIPS with 32 kB of in-system programmable Flash memory and 4352 bytes of RAM. The device integrates a USB 2.0 function controller supporting full-speed (12 Mbps) and low-speed (1.5 Mbps) operation, complete with an integrated transceiver and on-chip clock recovery. Digital peripherals include four 16-bit timers, a Programmable Counter Array, SPI, SMBus, and UART interfaces. It operates within a voltage range of 2.7 V to 5.25 V and supports industrial temperature ranges.

Feature Summary

• Integrates a USB 2.0 function controller with built-in transceiver and clock recovery for simplified connectivity.
• Features a pipelined 8051 core delivering up to 25 MIPS performance with expanded interrupt handling.
• Includes comprehensive digital communication interfaces such as SPI, SMBus, and enhanced UARTs.
• Supports non-intrusive in-system debugging via the on-chip C2 interface without external emulators.

Applications

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

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or certified partners. Confirm package integrity and pin alignment upon receipt. Ensure storage conditions comply with moisture sensitivity levels specified in the datasheet. Validate that the specific revision matches project requirements, noting that this series may be marked as not recommended for new designs.

Selection Notes

Select this model when a cost-effective USB-enabled MCU with moderate processing power is required. The 32 kB Flash variant suits applications with smaller firmware footprints compared to the 64 kB counterparts. Consider the 32-pin LQFP or QFN packages for space-constrained designs. Evaluate if the 25 MIPS speed meets real-time control needs before opting for higher-performance variants.

Part Context

This component belongs to the C8051F34x Full Speed USB Flash MCU family. It shares architectural similarities with other members like the C8051F340 and C8051F342 but differs in memory size and peripheral availability. The family is designed for embedded USB applications, offering a single-chip solution that reduces bill-of-materials by integrating analog and digital functions.

Replacement Considerations

Check for official successor parts from Silicon Labs, as this series is noted as not recommended for new designs. Verify pin compatibility and software register mapping if substituting with other C8051F34x variants or newer USB MCU families.