C8051F345-GQ

Overview

The C8051F345-GQ is a mixed-signal system-on-chip microcontroller from the Silicon Labs C8051F34x family, housed in a 48-pin TQFP package. It features an 8-bit CIP-51 core operating at up to 48 MIPS with 64 kB of Flash memory and 4352 bytes of RAM. The device integrates a USB 2.0 full-speed function controller with an integrated transceiver and clock recovery. Analog peripherals include a 10-bit ADC supporting up to 200 ksps, two comparators, and an internal voltage reference. Digital interfaces comprise SPI, SMBus, and dual UARTs. Operating voltage ranges from 2.7 V to 5.25 V using the on-chip regulator, with an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates a high-performance 8051-compatible core with pipelined architecture for efficient instruction execution.
• Includes a fully compliant USB 2.0 full-speed function controller with integrated transceiver and clock recovery circuitry.
• Features a 10-bit analog-to-digital converter with built-in multiplexer, window detector, and temperature sensor.
• Provides flexible digital I/O via a programmable crossbar decoder and supports multiple communication protocols including SPI, SMBus, and UART.

Applications

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

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific revision level matches design requirements. Check for end-of-life status as indicated in documentation. Ensure environmental compliance certifications are current. Validate package markings against official datasheet specifications before integration.

Selection Notes

Select this component when a complete USB-enabled solution is required without external PHY components. Consider the 48-pin TQFP package for board space constraints. Evaluate the 10-bit ADC resolution and speed against application signal processing needs. Verify that the 64 kB Flash capacity meets firmware storage requirements. Confirm power supply compatibility with the 2.7 V to 5.25 V operating range.

Part Context

This part belongs to the C8051F34x series of full-speed USB flash microcontrollers. It shares architectural similarities with other members like the C8051F340 and C8051F341 but differs in specific peripheral configurations and memory sizes. The series targets cost-sensitive applications requiring USB connectivity and moderate analog performance.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified documentation.

FAQ

Does the C8051F345-GQ require an external crystal for USB operation?

No, the device includes integrated clock recovery circuitry, eliminating the need for an external crystal for full-speed or low-speed USB operation.

What is the maximum sampling rate of the onboard ADC?

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