C8051F343-GQR

Overview

The C8051F343-GQR is a mixed-signal System-on-Chip microcontroller from Silicon Labs, belonging to the C8051F34x family. It features a high-speed pipelined 8051 core operating at up to 25 MIPS. The device integrates 32 kB of in-system programmable Flash memory and 2304 bytes of RAM. Key peripherals include a full-speed USB 2.0 function controller with an integrated transceiver and clock recovery, eliminating the need for external crystals or resistors. Digital interfaces comprise hardware-enhanced SPI, SMBus, and two UARTs. Analog capabilities consist of a multi-channel 10-bit ADC with a built-in temperature sensor and two comparators. The unit 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 on-chip clock recovery and transceiver
• High-speed pipelined 8051-compatible core delivering up to 25 MIPS performance
• On-chip debug circuitry enabling non-intrusive in-system debugging without external emulators
• Flexible digital crossbar allowing configurable peripheral pin mapping

Applications

• PC peripherals and embedded modems
• Point-of-sale (POS) terminals
• Medical diagnostic equipment
• Voice over Internet Protocol (VoIP) telephones

Procurement Notes

Verify component status before procurement as this series is marked Not Recommended for New Designs. Confirm package type matches design requirements, specifically the 32-pin LQFP or QFN options available for this model variant. Check for official Product Change Notifications regarding manufacturing updates. Ensure development tools support the specific silicon revision. Validate supply chain sources against authorized distributors to prevent counterfeit components.

Selection Notes

Select this model when a cost-effective USB connectivity solution is required alongside moderate processing power. The C8051F343 variant provides 32 kB Flash and 2304 bytes RAM, suitable for applications not requiring the larger memory footprint of the F340 series. Consider the 32-pin package constraints if board space is limited. Verify that the 25 MIPS speed meets real-time processing demands. Evaluate the analog peripheral set, noting that this specific model lacks the internal voltage reference found in other family members.

Part Context

This component belongs to the C8051F34x Full Speed USB Flash MCU family by Silicon Labs. These devices are designed as single-chip solutions for embedded USB applications, combining a robust 8051 CPU with extensive analog and digital peripherals. The family shares common architectural features but varies in memory size, package count, and specific analog module availability. The C8051F343 represents a mid-range configuration within this lineup.

Replacement Considerations

Public documentation indicates the C8051F380-GQ as a next-generation alternative. Verify compatibility during migration as newer models may offer enhanced performance or updated feature sets. Review datasheet revisions for any changes in pinout or electrical characteristics between legacy and successor parts.