The USB 2.0 to RS-232 cable with A-connector provides one high-performance 16C550-type UART compatible RS-232 TTL/CMOS serial port. It is designed for PC, thin client, or server to provide instant COM port expansion via the USB 1.1 up to 3.2 Gen 1 Bus. The EX-1310-TTL provides a USB to RS-232 port with 5V, 3.3V, 2.5V, and 1.8V TTL/CMOS compatible logic levels. With easy installation, you do not need to open the computer system to install the EX-1310-TTL while the system is running.

Interface: RS-232 V.24 and TTL/CMOS
FIFO Buffer: 16C550 with 16 bytes
Logic Level: 5V, 3.3V, 2.5V, 1.8V (set with a dip switch)
Data Bits: 7 and 8 / Stop Bits: 1, 2 / Parity: none, even, odd, space, mark
Signal RS-232: TxD, RxD, GND
Power: from the USB bus (bus power)
Chipset: FTDI.