C8051F348-GQR

Overview

The C8051F348-GQR is an 8-bit mixed-signal System-on-Chip microcontroller from the C8051F34x family, manufactured by Silicon Labs. It features a high-speed pipelined 8051 core operating at 25 MIPS with a maximum clock frequency of 25 MHz. The device integrates 32 kB of in-system programmable Flash memory and 2.25 kB of RAM. Key peripherals include a USB 2.0 function controller with integrated transceiver and clock recovery, four general-purpose 16-bit timers, a Programmable Counter Array (PCA), and multiple digital communication interfaces such as SPI, SMBus, and UART. It operates within a voltage range of 2.7 V to 5.25 V using an on-chip voltage regulator and supports industrial temperatures from -40°C to +85°C.

Feature Summary

• Integrates a full-speed USB 2.0 function controller with an on-chip transceiver and clock recovery, eliminating the need for external crystals or resistors.
• Features a high-performance pipelined 8051-compatible core capable of executing up to 25 MIPS.
• Includes extensive digital peripherals such as hardware-enhanced SPI, SMBus, dual UARTs, and a 16-bit Programmable Counter Array.
• Supports flexible pin configuration through a programmable digital crossbar and provides non-invasive in-system debugging via the C2 interface.

Applications

• USB-enabled embedded systems and PC peripherals
• Point-of-sale terminals and data acquisition devices
• Industrial control modules requiring serial communication
• Portable instruments with low-power requirements

Procurement Notes

Verify component authenticity against official Silicon Labs documentation before integration. Confirm that the specific revision matches design requirements, as this series is marked Not Recommended for New Designs. Ensure supply chain stability due to potential end-of-life status. Validate package integrity upon receipt to prevent damage to the TQFP-48 pins during handling.

Selection Notes

Select this component when a cost-effective USB connectivity solution is required without external PHY components. It is suitable for applications needing moderate processing power and standard digital interfaces. Consider alternative newer families if long-term availability is critical, as this model is not recommended for new designs. Evaluate memory constraints carefully, as it offers 32 kB Flash compared to higher-capacity variants in the same series.

Part Context

The C8051F348-GQR belongs to the C8051F34x Full Speed USB Flash MCU family. This series is designed to provide a single-chip solution for USB applications by integrating analog and digital peripherals with a high-speed 8051 core. The GQR suffix indicates a tape-and-reel packaging format suitable for automated surface-mount assembly processes.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult Silicon Labs for current alternatives, as this series is designated Not Recommended for New Designs.