Coolgear RS232 to TTL CMOS Converter Adapter

The RS232 to TTL converter can be used in CMOS conversion also for RS232 interface with TTL or CMOS voltage level. This TTL/CMOS converter is designed for PC, Workstation, thin client, or server providing instant conversion to devices needing a RS232 interface.

Connect the RS232 TTL converter directly to your PC's female DB-9 COM port, supports standard RS232 signals TxD, RxD, RTS, CTS, and GND. The converter does not require DC power from an outside source, it is powered by the RS232 signal.

• Provides one RS232 to TTL/CMOS adaption


• Supports 4-signal RS232 Conversion: (TxD, RxD, RTS, CTS, and GND)


• Supports DB-9 Female (DCE) to DB9 Male (TTL/CMOS) Connector Conversion


• Supports 5V and 3.3V Tolerance Signals


• Signal levels are inverted by the converter similar to standard RS232 but in TTL/CMOS swing level


• Supports baud rate up to 115.2 Kbps


• Port-Powered, no external power required


• No driver required fo all operating systems.

• 1x RS232 to TTL / CMOS converter


• User Manual

OS Support:

• Windows 11, 10, 8, 7, Vista, and XP


• Linux and Mac OS 10.X