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CH341B, in 3D

CH341B

WCH (Nanjing Qinheng Microelectronics)

-20℃~+70℃ 2Mbps 3.3V、5V USB 2.0 USB to UART、USB to Parallel、USB to Synchronous Serial Interface SOP-28 USB Converters ROHS

Extended
DatasheetJLCPCBLCSCwch/CH341B
Category
USB Converters
Package
SOP-28
Pins
28

Overview

The CH341B is a USB Converter made by WCH (Nanjing Qinheng Microelectronics) in a SOP-28 package with 28 pins. -20℃~+70℃ 2Mbps 3.3V、5V USB 2.0 USB to UART、USB to Parallel、USB to Synchronous Serial Interface SOP-28 USB Converters ROHS.

PCBKit's library has its KiCad symbol (EasyEDA_Cloud:CH341B, from EasyEDA) and its footprint (Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm, from KiCad's library), ready for a KiCad board. 20 are in stock at JLCPCB (part C19185820).

Symbol

ACT#1RSTI2IN73ROV#4TXD5RXD6INT#7IN38V39UD+10UD-11GND12XI13XO14CTS#15DSR#16RI#17DCD#18OUT#19DTR#20RTS#21SLP#22SDA23SCL24RDY#25TNOW26TEN#27VCC28
EasyEDA_Cloud:CH341BFrom EasyEDA

Footprint

12345678910111213141516171819202122232425262728
Package_SO:SOIC-28W_7.5x17.9mm_P1.27mmFrom KiCad's library

Parameters

8
Applications Function
USB to Synchronous Serial Interface
Current - Supply
20mA
Data Rate
2Mbps
Features
Programmable baud rate；Built-in clock generator；Power-on reset
Operating Temperature
-20℃~+70℃
Quiescent Supply Current
120uA
USB Protocol
USB 2.0
Voltage - Supply
5V

Order codes

1

Pinout

28
The pins of the CH341B
PinNameType
1ACT#Unspecified
2RSTIUnspecified
3IN7Unspecified
4ROV#Unspecified
5TXDUnspecified
6RXDUnspecified
7INT#Unspecified
8IN3Unspecified
9V3Unspecified
10UD+Unspecified
11UD-Unspecified
12GNDUnspecified
13XIUnspecified
14XOUnspecified
15CTS#Unspecified
16DSR#Unspecified
17RI#Unspecified
18DCD#Unspecified
19OUT#Unspecified
20DTR#Unspecified
21RTS#Unspecified
22SLP#Unspecified
23SDAUnspecified
24SCLUnspecified
25RDY#Unspecified
26TNOWUnspecified
27TEN#Unspecified
28VCCUnspecified

Show this part on your page

A live frame, for any web page
<iframe src="https://pcbkit.io/embed/parts/wch/CH341B" title="CH341B in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe>
A picture
<img src="https://pcbkit.io/embed/parts/wch/CH341B.jpg" alt="CH341B" width="1200" height="900">
A picture that opens the part, for a README
[![CH341B](https://pcbkit.io/embed/parts/wch/CH341B.jpg?size=s)](https://pcbkit.io/parts/wch/CH341B)

Questions

Is there a KiCad symbol and footprint for the CH341B?

Yes. The symbol is EasyEDA_Cloud:CH341B and the footprint Package_SO:SOIC-28W_7.5x17.9mm_P1.27mm, both drawn on this page. PCBKit places them on a board for you when you design with it.

What package is the CH341B?

SOP-28, with 28 pins. Its footprint is drawn on this page.

Where is the CH341B datasheet?

WCH (Nanjing Qinheng Microelectronics) publishes it: the Datasheet link on this page opens it.

Where can I order the CH341B?

JLCPCB lists it as part C19185820, with 20 in stock; the sellers' links on this page open their listings.

What can replace the CH341B?

Parts like it in the library: the CH376S by WCH (Nanjing Qinheng Microelectronics), the CH341A by WCH (Nanjing Qinheng Microelectronics), the CH375B by WCH (Nanjing Qinheng Microelectronics) and the CH340S by WCH (Nanjing Qinheng Microelectronics). Check their datasheets: a part that fits the footprint may still differ in its ratings.

Parts like it

8