C8051F346-GQR

Overview

The C8051F346-GQR is an 8-bit mixed-signal System-on-Chip microcontroller from the Silicon Labs C8051F34x family. It features a high-speed pipelined 8051 core operating at 25 MIPS, paired with 32 kB of in-system programmable Flash memory and 2304 bytes of RAM. The device integrates a full-speed USB 2.0 function controller with an on-chip transceiver and clock recovery, eliminating the need for external components. Analog peripherals include a 10-bit ADC with up to 200 ksps sampling rate, two comparators, and a temperature sensor. Digital interfaces comprise SPI, SMBus, and UARTs. It operates within a voltage range of 2.7 V to 5.25 V using an internal 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 missing clock detector for simplified connectivity.
• Features a high-performance pipelined 8051-compatible core capable of executing instructions in one or two system clocks.
• Includes a 10-bit analog-to-digital converter with built-in multiplexer supporting single-ended and differential modes.
• Provides flexible digital I/O via a programmable crossbar decoder allowing peripheral pin configuration.

Applications

• PC peripherals and embedded USB devices
• Point-of-sale (POS) terminals
• Medical diagnostic equipment
• Embedded modems and VoIP telephones

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and moisture sensitivity level handling procedures prior to assembly. Review the latest datasheet revision for any updates to electrical characteristics or pin definitions. Ensure compliance with RoHS directives and environmental regulations applicable to your region before finalizing procurement orders.

Selection Notes

Select this model when a cost-effective USB-enabled MCU with moderate processing power is required. The 25 MIPS core and 32 kB Flash suit applications not demanding high throughput or large code storage. Verify that the 32-pin LQFP or QFN package fits the board layout constraints. Consider the integrated voltage regulator if operating near the upper supply limit. Evaluate alternative F34x variants if higher clock speeds or larger memory capacities are necessary.

Part Context

This component belongs to the C8051F34x series of full-speed USB flash MCUs by Silicon Laboratories. The series targets applications requiring robust USB connectivity combined with mixed-signal capabilities. The C8051F346 variant specifically offers 25 MIPS performance and 32 kB Flash, distinguishing it from higher-end models like the F340 which provide 48 MIPS and 64 kB Flash. All members share common architectural features including the CIP-51 core and USB function controller.

Replacement Considerations

The C8051F340-GQR serves as a functional substitute within the same family, offering identical architecture but with increased memory and clock speed. Designers must account for the pinout compatibility between the 32-pin packages of the F346 and other compatible variants. Firmware porting may be required due to differences in available Flash and RAM sizes. Consult the official datasheet for detailed pin mapping and electrical specification comparisons.