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USB to 3.3V TTL DB9 Adapter

Special Price $29.95

Regular Price: $39.95

Quick Overview

USB to 3.3V TTL DB9 Adapter, all USB protocol is handled within this adapter once connected.

Availability: In stock



Manufacturer: GearMo


This USB to 3.3V TTL DB9 Adapter is a Serial UART (TTL level) adapter and allows you to connect your computer through a USB port and use it as a regular serial communication port. All USB protocol is handled within this adapter once connected, there is no other device or programming required. The adapter is perfect for embedded systems that require a serial connection to a computer. The board attaches directly to the USB bus via a standard type A receptacle connector. It shows up on any Windows computer as a standard serial COM port. Any applications that talk to this COM port is automatically convert to USB and back to UART to your target board.

USB to 3.3V TTL DB9 Adapter Features

  • The Cable provides a USB to TTL Serial interface with DB9 D-SUB connector.
  • Single board USB to asynchronous serial data transfer interface
  • Entire USB protocol handled by the electronics in the cable USB
  • UART interface support for 7 or 8 data bits, 1 or 2 stop bits and odd / even / mark / space / no parity
  • Fully assisted hardware (RTS#/CTS#) or X-On / X-Off software handshaking.
  • Data transfer rates from 300 baud to 3 Mbaud at TTL levels.
  • +3.3V output allows external logic to be powered from the USB port
  • Transmit and receive LEDs
  • UHCI / OHCI / EHCI host controller compatible
  • Low USB bandwidth consumption.

DB-9M Pin Assignment

  2. RX
  3. TX
  5.  GND
  7. RTS
  8. CTS

Additional Information

UPC 729440625863
Manufacturer GearMo
Color Beige
Cable Length 3 feet
Warranty One Year
DB9 Gender Male w/ Hex Nuts