Part Number: CH340
Function: USB Bus Convert Chip
Package: SSOP-20 type
Manufacturer: Jiangsu QinHeng
The CH340 is a USB bus convert chip and it can realize USB convert to serial interface, USB convert to IrDA infrared or USB convert to printer interface.
In serial interface mode, CH340 supplies common MODEM liaison signal, used to enlarge asynchronous serial interface of computer or upgrade the common serial device to USBbus directly.
More detail about USB convert to printer interface please referring to the second manual CH340DS2. In infrared mode, add infrared transceiver to CH340 can compose USB infrared adapter, realize SIR nfrared communication.
1. Full speed USB device interface, conforms to USB Specification Version 2.0, only needs crystal and
2. Standard USB print interface, used to upgrade the original parallel printer, compatible with the
relative USB criterion.
3. Compatible with Windows operation system, drive program is not need in Windows 2000 and XP,
the application program is totally compatible.
Other data sheets are available within the file: CH340S, CH340R, CH340T