C8051F340-GQ

Overview

The C8051F340-GQ is a mixed-signal System-on-Chip microcontroller from Silicon Labs, featuring a high-speed pipelined 8051 core operating at up to 48 MIPS. It integrates 64 kB of in-system programmable Flash memory and 4352 bytes of RAM. The device includes a full-speed USB 2.0 controller with an integrated transceiver and clock recovery, eliminating the need for external components. Analog peripherals consist of a 10-bit ADC supporting up to 200 ksps, two comparators, and a temperature sensor. Digital interfaces include UARTs, SPI, and SMBus. It operates on a voltage supply of 2.7 V to 5.25 V using an internal regulator and functions within a temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated full-speed USB 2.0 controller with built-in transceiver and clock recovery for simplified hardware design.
• High-performance 8051 core executing most instructions in one or two system clocks for efficient processing.
• On-chip debug circuitry enabling non-intrusive in-system debugging without external emulators.
• Flexible I/O configuration via a priority crossbar decoder allowing customizable pin assignments.

Applications

• PC peripherals and point-of-sale terminals
• Data acquisition systems requiring analog signal processing
• Embedded USB communication devices

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity upon receipt, as the TQFP-48 form factor requires careful handling during storage and assembly. Ensure compliance with RoHS standards if required by your manufacturing specifications. Review the latest datasheet revision for any updates to electrical characteristics or pin definitions before finalizing procurement orders.

Selection Notes

Select this component when a fully integrated USB solution is required without external PHY components. The 48 MHz core speed suits applications needing moderate processing power alongside analog capabilities. Consider the 40 available I/O pins for interface flexibility. Note that this family is marked as not recommended for new designs; evaluate newer alternatives for long-term production viability unless existing designs mandate this specific part number.

Part Context

This device belongs to the C8051F34x series of full-speed flash MCUs. It shares architectural similarities with other members like the C8051F341 but differs in memory size and peripheral availability. The GQ suffix indicates a 48-pin TQFP package variant. It is designed to replace discrete USB controller and MCU combinations, reducing board space and component count in embedded systems.

Replacement Considerations

Silicon Labs recommends evaluating next-generation alternatives such as the C8051F380 series for new projects due to the 'Not Recommended for New Designs' status. Direct pin-to-pin replacements may require firmware adaptation due to potential differences in peripheral registers or clock configurations.

FAQ

Does the C8051F340-GQ require an external crystal for USB operation?

No, the device features an integrated clock recovery mechanism that allows full-speed USB operation without an external crystal.

What is the maximum sampling rate of the onboard ADC?

The 10-bit ADC supports a maximum sampling rate of 200 ksps.