USB TTL Serial Cable, TTL to USB Serial Converter Generic Cables, With Ftdi Chip, TTL-232RG-VREG1V8-WE, 1.8M eter ^^ USB TTL serial cable is a series of USB to serial converter cables that provide a connection between USB and serial UART interfaces. ^^ Supports TTL level UART signals based on+ 1.8V and+ 1.8V /100mA power output. ^^ Each USB-RS232 cable contains a small internal electronic circuit board utilizing the FT232R that is encapsulated into the USB connector end of the cable. ^^ Quality assurance, using professional industrial grade chips, each cable leaving the factory undergoes professional equipment testing to ensure a 100% qualified usage rate of the cables.