SMAKN&reg; Original Chip PL2303HXD USB to TTL Upgrade Converter USB to serial cable This is USB-TTL converter cable, internal use PL-2303HXD converter chip, length 1M, support windowsXP / WIN / 7/8. Have drawn six connections, leads RTS CTS TXD RXD GND 5V: Can be used for a variety of equipment development, debugging, programming, promotion, etc. Brush. Can be used for a variety of equipment development, debugging, programming, promotion, etc. Brush. Do not crash, die serial, stable performance, which is the purpose of this conversion line of custom.