C8051F34C-GQR

Overview

The C8051F34C-GQR is an 8-bit microcontroller from the Silicon Labs C8051F34x family, housed in a 48-pin TQFP package. It features a high-speed 8051 core operating at 48 MIPS with 64 kB of Flash memory and 4352 bytes of RAM. The device integrates a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery. Digital peripherals include two enhanced UARTs, SPI, SMBus, four 16-bit timers, and a 16-bit PCA. It supports a supply voltage range of 2.7 V to 5.25 V using an on-chip regulator and operates within a temperature range of -40 °C to +85 °C.

Feature Summary

• Integrates a full-speed USB 2.0 function controller with built-in transceiver and clock recovery, eliminating the need for external crystals or resistors.
• Features a pipelined 8051 core executing up to 48 MIPS, supported by 64 kB of in-system programmable Flash and 4352 bytes of RAM.
• Includes dual enhanced UARTs, hardware-enhanced SPI, and SMBus interfaces alongside a priority crossbar decoder for flexible pin configuration.
• Provides on-chip debug capabilities allowing non-intrusive in-system debugging without requiring external emulation hardware.

Applications

• Embedded modems
• Voice over Internet Protocol (VoIP) telephones
• Medical diagnostic equipment
• Point-of-sale terminals

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required package and temperature grade. Check for current lifecycle status as this series may be marked not recommended for new designs. Ensure ESD handling protocols are followed during storage and assembly.

Selection Notes

Select this model when a complete single-chip USB solution is required without external PHY components. Consider the 48-pin TQFP package constraints and verify that the 4352-byte RAM and 64 kB Flash meet application memory requirements. Ensure the design utilizes the internal voltage regulator if operating above 3.6 V.

Part Context

This component belongs to the C8051F34x Full Speed USB Flash MCU family produced by Silicon Laboratories. The family provides mixed-signal system-on-chip solutions combining an 8051-compatible processor with extensive analog and digital peripherals. The C8051F34C variant specifically offers 64 kB of Flash and dual UARTs in a 48-pin form factor.

Replacement Considerations

Public confirmed substitute part numbers: C8051F340-GQR, C8051F341-GQR, C8051F344-GQR, C8051F345-GQR, C8051F348-GQR.