What are the key features of the CH342K?

It features dual full-duplex UARTs, hardware flow control, support for baud rates up to 3Mbps, and flexible I/O voltage levels from 1.8V to 5V.

Does the CH342K require an external crystal?

No, the CH342K has a built-in clock generator, which simplifies the design and reduces the component count.

What should engineers consider when designing with the CH342K?

Engineers should ensure proper decoupling capacitors are placed close to the power pins and that the USB D+/D- lines are routed as a differential pair with controlled impedance.

What should sourcing teams check before buying CH342K?

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

What is the pinout of CH342K?

Use the CH342K datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about CH342K pinout to locate pins, power rails, and interface signals before layout.

CH342K Datasheet, Specs, Alternatives & ECAD | WCH

AI summary

The CH342K is a highly integrated USB-to-dual-UART bridge chip, ideal for adding serial connectivity to systems with minimal external components.

Best for

USB-to-Serial conversion
MCU firmware updates
Adding serial ports to embedded systems

Avoid if

High-speed data requirements exceeding 3Mbps
Applications requiring more than two serial ports

Check before use

I/O voltage compatibility with the target MCU
USB power supply requirements

Key specifications

Baud Rate: 50 bps - 3 Mbps
I/O Voltage: 1.8V - 5V
Interface: USB 2.0 Full-Speed
Package: ESSOP10

Compliance & Environment

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

Application

Industrial AutomationConsumer ElectronicsEmbedded Systems

Datasheet

a81540255e3035d7952909129958be26.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for CH342K: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol

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PCB Footprint

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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 CH342K is a USB 2.0 full-speed bridge chip that converts USB signals into two independent asynchronous serial (UART) ports.

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 CH342K?+×

What are the key features of the CH342K?+×

Does the CH342K require an external crystal?+×

What should engineers consider when designing with the CH342K?+×

What should sourcing teams check before buying CH342K?+×

What is the pinout of CH342K?+×