C8051F349-GM

Overview

The C8051F349-GM is a fully integrated mixed-signal System-on-Chip MCU from the C8051F34x family, designed for USB applications. It features a high-speed pipelined 8051-compatible core operating at up to 48 MIPS (25 MIPS version available). The device includes 32 kB of in-system programmable Flash memory and 2304 Bytes of RAM. Key peripherals include an on-chip USB 2.0 function controller with integrated transceiver and clock recovery, two comparators, four general-purpose 16-bit timers, and a Programmable Counter Array. It operates within a voltage range of 2.7 V to 5.25 V and supports industrial temperatures from -40 °C to +85 °C.

Feature Summary

• Integrated full-speed USB 2.0 function controller with built-in transceiver and clock recovery, eliminating the need for external crystals or resistors.
• High-performance 8051 microcontroller core with pipelined architecture supporting up to 48 MIPS execution speed.
• On-chip debug circuitry enabling non-intrusive in-system debugging without requiring external emulation hardware.
• Flexible digital I/O port configuration with a priority crossbar decoder allowing customizable peripheral pin mapping.

Applications

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

Procurement Notes

Verify component authenticity through authorized Silicon Labs distributors or direct manufacturer channels. Confirm package integrity upon receipt, as moisture sensitivity requires proper handling. Check for specific revision markings against datasheet Rev. 1.7 specifications. Ensure compliance with RoHS directives if required by your assembly process. Validate part numbers against official discontinuance notifications, as this series may be marked Not Recommended for New Designs.

Selection Notes

Select the C8051F349-GM when USB connectivity is required alongside moderate Flash memory capacity. This variant specifically offers 32 kB Flash and 2304 Bytes RAM, distinguishing it from higher-capacity siblings like the F340. Choose this model for designs needing dual UARTs and analog comparators without the overhead of a 10-bit ADC. Consider the 32-pin LQFP package for standard surface-mount assembly requirements.

Part Context

This component belongs to the C8051F34x Full Speed Flash MCU family, which provides single-chip solutions for embedded USB applications. The family shares a common architecture but varies in memory size and peripheral availability. The C8051F349 represents a mid-range option within this series, balancing processing power with cost-effective integration for mass-produced consumer electronics.

Replacement Considerations

Publicly confirmed substitute part numbers are not explicitly listed in the provided documentation. Designers should consult Silicon Labs for current alternative recommendations due to the 'Not Recommended for New Designs' status of the C8051F34x family.