USB to Serial IC - CH340E (10 Pack)

The USB to Serial CH340E IC is a USB bus conversion chip, it can realize USB to UART interface or USB to printer interface. In serial UART mode, CH340E provides common MODEM liaison signal, used to expand UART interface of computer or upgrade the common serial device to USB bus directly. CH340 is a 3x3mm tiny chip comes in MSOP10 package and has 10 pins. The CH340E has a built in crystal.

  • 10x CH340E USB to Serial IC
  • Full speed USB device interface, compatible with USB v2.0.
  • Emulate standard UART interface, used to upgrade the serial peripherals, or expand UART interface via USB bus.
  • Original serial applications are totally compatible, without any modification in Windows.
  • Hardware full duplex serial UART interface, built-in transmit-recieve buffer, supports communication baud rate varies from 50bps to 2Mbps.
  • Supports common MODEM liaison signal RTS, DTR, DCD, RI, DSR and CTS.
  • Support 5V and 3.3V power supply.
  • Built-in crystal.

USB to Serial IC - CH340E (10 Pack) Product Help and Resources

How to Install CH340 Drivers

August 6, 2019

How to install CH340 drivers (if you need them) on Windows, Mac OS X, and Linux.

Core Skill: Soldering

This skill defines how difficult the soldering is on a particular product. It might be a couple simple solder joints, or require special reflow tools.

3 Soldering

Skill Level: Competent - You will encounter surface mount components and basic SMD soldering techniques are required.
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Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

2 Programming

Skill Level: Rookie - You will need a better fundamental understand of what code is, and how it works. You will be using beginner-level software and development tools like Arduino. You will be dealing directly with code, but numerous examples and libraries are available. Sensors or shields will communicate with serial or TTL.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

3 Electrical Prototyping

Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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Looking for answers to technical questions?

We welcome your comments and suggestions below. However, if you are looking for solutions to technical questions please see our Technical Assistance page.

  • scharkalvin / about 2 years ago / 1

    This chip is the same size as the Si5351 which I have hand soldered many times. Not the easiest part to solder, but doable, and breakout DIP boards are available. (actually, I think that a mini, micro, or USB-C connector would be HARDER to solder!)

  • keen101 / about 4 years ago / 1

    Is there an EagleCAD footprint available for this? I have a project i would like to use this on right away. No footprint is available from Mouser, so i thought i would ask you directly?

    P.S. Will this chip trigger the reset line when uploading a program to an arduino chip or will i need to push the reset button manually?

    • santaimpersonator / about 4 years ago / 1

      I believe that information should be in the datasheet.

      That being said, I think I saw that the package was added to our eagle library. Also, we use this chip on this Artemis thing plus, see the schematic.

  • Member #575516 / about 4 years ago / 1

    Do you sell the CH340C variant in a similar 10-pack or are planning to? I've loved using it on the RedBoard Qwiic and I'm designing my own board that uses it, but I'm having a heck of a time finding it through a distributor.

    Alternatively, would this be a suitable replacement for the CH340C?

    • santaimpersonator / about 4 years ago / 1

      I'll reach out to the catalog team. Unfortunately, I am not familiar with the intricacies between the various chip versions.

  • dbc / about 4 years ago / 1

    What is the driver situation with this chip? Is there someplace that gives an example of programming the configuration EEPROM? The datasheet is awfully sketchy.

    • santaimpersonator / about 4 years ago / 1

      Hi there, it sounds like you are looking for technical assistance. Please use the link in the banner above, to get started with posting a topic in our forums. Our technical support team will do their best to assist you.

      As @ppelleti mentions, there is no EEPROM to configure. Also, there is a driver installation guide linked above; otherwise, you can download them directly from the chip manufacturer.

    • ppelleti / about 4 years ago / 1

      My understanding of the datasheet is that only the CH340B has an EEPROM, and the item for sale here is the CH340E. So, no EEPROM to configure, I believe.

      Driver-wise, I know this is supported out-of-the-box on Linux, without needing to install drivers. I'm less sure what the driver situation is for Windows and Mac OS.

  • I hope this makes its way into new sparkfun products!

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