What are the key features of the CH340K?

It supports 5V/3.3V operation, has an internal clock generator, supports baud rates up to 2Mbps, and includes integrated diodes to prevent current backflow.

Does the CH340K require an external crystal?

No, the CH340K has an internal clock generator, which simplifies the circuit design and reduces component count.

How does the CH340K handle dual-power supply systems?

It includes built-in diodes that prevent current from flowing back into the chip when the MCU is powered independently, protecting the system.

What should sourcing teams check before buying CH340K?

Check lifecycle (Active), compliance data, distributor availability, and approved-source coverage. Current sourcing signal: low; readiness: easy.

What is the pinout of CH340K?

Use the CH340K datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about CH340K pinout to locate pins, power rails, and interface signals before layout.

CH340K Datasheet, Specs, Alternatives & ECAD | WCH

AI summary

The CH340K is a compact, integrated USB-to-UART bridge chip ideal for space-constrained designs requiring backflow protection.

Best for

USB-to-Serial adapters
MCU programming interfaces
Compact embedded systems

Avoid if

Applications requiring high-speed USB 3.0 or specialized non-UART protocols

Check before use

Ensure the correct supply voltage (3.3V or 5V) is applied to the V3 pin as per the datasheet.

Key specifications

Baud Rate: 50bps - 2Mbps
Package: ESSOP-10
Supply Voltage: 3.3V / 5V

Compliance & Environment

RoHS: Compliant
REACH: -
MSL: -
ECCN: -
HTSUS: -

Application

GeneralIndustrial

Datasheet

aaf97b377242833819d10eb14b21e4c8.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for CH340K: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

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3D Model

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Where to Buy

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

The CH340K is a USB-to-serial UART bridge chip from WCH, featuring an integrated clock and built-in protection against current backflow.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Where to Buy

Alternative components

Design and risk insights

Questions & answers

What is the CH340K?+×

What are the key features of the CH340K?+×

Does the CH340K require an external crystal?+×

How does the CH340K handle dual-power supply systems?+×

What should sourcing teams check before buying CH340K?+×

What is the pinout of CH340K?+×