What are the key specifications of the CH340N?

It supports USB 2.0 full-speed, baud rates up to 2Mbps, operates at 3.3V or 5V, and features an internal clock generator in an SOP-8 package.

Does the CH340N require an external crystal?

No, the CH340N has a built-in clock generator, which simplifies the circuit design and reduces component count.

What should engineers review before using the CH340N?

Ensure the supply voltage (3.3V or 5V) is correctly configured and that decoupling capacitors are placed close to the VCC and V3 pins.

What should sourcing teams check before buying CH340N?

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

What is the pinout of CH340N?

Use the CH340N datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about CH340N pinout to locate pins, power rails, and interface signals before layout.

CH340N Datasheet, Specs, Alternatives & ECAD | WCH

AI summary

The CH340N is a compact, cost-effective USB-to-UART bridge chip with an internal clock, ideal for space-constrained serial communication designs.

Best for

USB-to-Serial conversion
Compact embedded designs

Avoid if

Applications requiring full MODEM control signals (DTR, DSR, etc.)

Check before use

Supply voltage levels
Decoupling capacitor placement

Key specifications

Baud Rate: 50bps - 2Mbps
Package: SOP-8
Clock: Internal
Voltage: 3.3V / 5V

Compliance & Environment

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

Application

General Serial CommunicationEmbedded Systems

Datasheet

5e84781b80ee2ca9698082c53a509ea0.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for CH340N: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol

Schematic symbol for your EDA tool

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PCB Footprint

Land pattern for PCB layout

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3D Model

STEP file for mechanical design

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KiCad Library

Verified KiCad 8 symbol, footprint, and 3D model

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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 CH340N is a USB-to-serial UART bridge chip that allows computers to communicate with serial devices via USB.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Alternative components

Design and risk insights

Questions & answers

What is the CH340N?+×

What are the key specifications of the CH340N?+×

Does the CH340N require an external crystal?+×

What should engineers review before using the CH340N?+×

What should sourcing teams check before buying CH340N?+×

What is the pinout of CH340N?+×