This is CH340G USB To TTL(Serial) Converter, USB to TTL / USB-TTL /STC microcontroller programmer / PL2303 in nine upgrades plate with a transparent cover Compatible with ARDUINO, RASPBERRY PI, AVR, PIC, 8051, etc.

This USB – TTL converter is based on CH340G USB to Serial TTL converter chip. The module can be used for 3.3Volt logic level signals, the and has the option to switch from 5Volt to 3.3Volt logic level using a 2 pin shunt supplied with the module.

The module includes a small switch which allows the voltage available at the VC (Supply output) pin to be switched between 3.3 and 5V. Data pins include TX, RX. These digital pins are at 5V TTL levels allowing them to be directly interfaced most 5V microcontrollers.

Supports

1. Support WINDOWS 98 / ME / 2000 / XP / Server 2003 / VISTA /Server 2008 / Win7 / Win8 32 Bit / 64
2. Support USB1.1 or USB2.0/USB3.0 for communication.
3. Provide RS232, RS485, RS422 interface.
4. Simulation interface, you can upgrade serial peripherals.
5. Supports common MODE contact signal.
6. Supports IRDA SIR infrared communication.
7. Programming does not affect the target board program runs.