WCH CH340G USB-UART SOP-16 Converter

Product Description

Specifications:

• Compatibility: USB2.0
• OS support: Windows / MAC / Linux
• Driver: CH341
• Supply voltage: 3.3-5VDC
• TTL: 3.3V and 5V
• Does not require additional power supply
• Pins: GND, TXd, RXd, VCC, RTS, CTS

Features:

* Full-speed USB device interface, USB 2.0 compatible.
* Emulate standard UART interface, used to upgrade the original serial peripheral or expand additional UART via USB.
* Original UART applications are totally compatible without any modification in Windows operating systems.
* Hardware full duplex UART interface, integrated transmit-receive buffer, supports communication baud rate varies from 50bps to 2Mbps.
* Supports common MODEM interface signals RTS, DTR, DCD, RI, DSR and CTS.
* Provides further RS232, RS485, RS422 interface, etc. through external voltage conversion chip.
* CH340R supports IrDA criterion SIR infrared communication, supports baud rate varies from 2400bps to 115200bps.
* Built-in firmware, software compatible with CH341, use VCP driver of CH341 directly.
* Supports 5V and 3.3V power supply voltages.
* CH340C/N/K/E/X/B have integrated clock, no external crystal required, CH340B also integrates EEPROM used to configure the serial number, etc.
* RoHS compliant SOP-16, SOP-8, SSOP-20 and ESSOP-10, MSOP-10 lead-free package.

Note:

CH340C, CH340N, CH340K, CH340E, CH340X and CH340B have integrated clock, no external crystal required.
CH340B has integrated EEPROM used to configure serial number, some functions can be customized, etc.
CH340K has 3 built-in diodes to reduce current flow backwards between the I/O pins of the MCU.
The EPAD of CH340K is 0# pin (GND), which is an optional connection; the 3# pin (GND) is the necessary connection.
CH340X is improved based on CH340E, with 5V tolerant characteristic added when the power supply is 3.3V.
6# pin of CH340X can be changed from TNOW to DTR# when an external resistor is connected, see Section 5.3 for the two configurations.
CH340C whose batch number begins with 4 and last 3-digit greater than B40, 8# pin can be changed to DTR# when a 4.7KΩ pull-down resistor is connected.
CH340R provides reverse polarity TXD and MODEM interface signals, discontinued.
The USB transceiver of CH340 is designed according to the built-in design of USB2.0, and it is recommended that no external resistor is in series with UD+ and UD- pins.

Datasheet