USB to TTL Level Serial Converter Board

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The TITAN USB-TTL is a USB-to-TTL level serial converter board, which provides a simple way to link from a USB port to 5V or 3.3V TTL level serial interface devices. USB-TTL is designed with selectable I/O pins that can be configured flexibly to operate at 5V or 3.3V level to meet the different requirements of microcontrollers of embedded systems. This USB-TTL converter board is suitable for most microcontroller interfaces.

In addition to the signals of RxD, TxD, RTS#, CTS#, the USB-TTL can provide +5VDC or +3.3VDC power output from the corresponding 5V or 3.3V TTL level serial interface setting. VCC power from pin-1 on the green terminal block connector can be configured for +5VDC or +3.3VDC output at 350mA. By default, +5VDC is enabled.

The USB-TTL is very easy to use. When it is connected to a computer and embedded system, the USB-TTL converter board looks like a virtual COM Port.


  • Adds a high speed TTL level serial interface via USB connection
  • Provides 3.3V or 5V TTL level serial interface for most microcontroller interfaces
  • Provides +5VDC or +3.3VDC power for external devices such as microcontrollers, Wi-Fi, Bluetooth, Xbee…etc.
  • 256 bytes receive data buffer
  • 128 bytes transmit data buffer for high speed throughput
  • Signals: RxD, TxD, RTS#, CTS#
  • Requires no IRQ, DMA, I/O port
  • Data rates: 300bps to 3Mbps
  • Provides terminal block connector for easy connection
  • Monitor LEDs of TxD, RxD indicating port status
  • LEDs for power indication
  • Virtual COM port drivers for Windows 10, 8.1, 8, 7, Vista, XP, 2000
  • Powered by USB port, no external power adapter required
  • CE, FCC approval


ComplianceUSB 2.0 Full Speed, USB 1.1 compliant
Speed12Mbps, full-speed USB
FIFO128 byte transmit
256 byte receive
Serial Interface
InterfaceTTL level
Number of Ports1
ConnectorTerminal block
Max. SpeedData transfer rates from 300 baud to 3 Mbaud
SignalsTxD, RxD, RTS, CTS, GND
Data Bits7, 8
ParityNone, Even, Odd, Mark, Space
Stop Bit1, 2
Flow ControlHardware (RTS, CTS), XON/XOFF
DriversWindows 2000 up to Windows 10
Windows Server 2000 up to 2018
Linux kernel 2.6+
Mac OS X support available
InstallationThe driver is already installed (Linux), or automatically downloading and installing device drivers after Device connection (Windows).
Power InputPower supplied via USB (5V) connector
No external power needed
Dimensions60mm × 30mm with USB Type-A connector
45mm × 30mm without USB Type-A connector


Product Manual


Driver Installation

You need to install driver first, prior to hardware installation. Do not connect the USB-to-Serial Adapter to the USB port of your computer, before you finish driver installation. 

Uninstalling Drivers

Uninstallation Guide For Windows 2000

Uninstallation Guide For Windows 10, 8.1, 8, 7, Vista, XP, Server 2016, Server 2008, Server 2003