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CH340S AI Analysis:
Datasheet, Specs, Alternatives & ECAD

AI summary

CH340S product

CH340S

Specialized

USB InterfacePrinter PortWCH

The CH340S is a dedicated USB-to-Parallel printer port interface chip designed for legacy printer upgrades.

Best for

  • Legacy printer USB conversion

Avoid if

  • General-purpose UART applications (use CH340G/C instead)

Check before use

  • Crystal oscillator requirements

Key specifications

Interface
USB 2.0 to Parallel
Supply Voltage
3.3V / 5V
Package
SOP-28

Compliance & Environment

RoHS
Compliant
REACH
-
MSL
-
ECCN
-
HTSUS
-

Application

Printer Connectivity

Datasheet

472373f24f672822ec62f4005784d93d_2403131131_WCH-Jiangsu-Qin-Heng-CH340S_C109467.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for CH340S: 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 CH340S is a USB bus adapter chip from WCH that converts USB signals into a parallel printer port interface, enabling legacy parallel printers to connect via USB.