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USB to RS232 Isolated TTL | CMOS Adapter Cable with TB

USB to RS232 Isolated TTL | CMOS Adapter Cable with TB

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Manufacturer: CoolGear
Barcode: 736983902382
Part Number: USB-232TTLMOS-IS
Warranty: One Year
In Stock: Yes
Ship Weight: 1 lbs.

Our Price: $39.95
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Product Rating: Product User Rating provided by ReviewGear

Pros: Easy installation, Works with Vista and Windows 7.

Product Description

USB to isolated RS232 TTL adapter with Dip switch voltage settings

Up until now you’ve had to make a choice between USB to TTL adapters and their voltage with either or selections. This USB to RS232 isolated TTL/CMOS adapter cable eliminates that by allowing you to choose a voltage setting right at the adapter’s connection point at the terminal block. If there is no need for isolation in your application, this adapter is also a non-isolated version available.

The USB-2323TTLMOS-IS provides a USB to RS232 port with 5V/3.3V/2.5V/1.8V TTL / CMOS compatible Logic levels. The RS232 signals include TXD, RXD, and GND with 2,500Vrms Isolation on each signal. The RS232 TTL cable is USB bus powered and does not need any DC power from an external AC Power Adapter. The TTL /CMOS RS232 signals are processed on the 5-pin Terminal Block.

Configuration for terminal block

  • Pin 1   TXD (Output)
  • Pin 2   RXD (Input)
  • Pin 3   VOUT (Output TTL / CMOS Power)
  • Pin 4   VIN (Input TTL / CMOS Power)
  • Pin 5   GND (Ground for TTL / CMOS)

Product Features

  • Provides 1 TTL/CMOS RS232 Serial Port over USB Port
  • Supports 3-Signal TTL/CMOS RS232 Conversion: (TXD, RXD, GND)
  • The 2,500Vrms Isolation Model is Available
  • Supports a 5-pin Terminal Blocks for TTL/COMS Signal Wiring
  • 5V/3.3V Logic Level Selectable by DIP Switch
  • Signal Levels are Similar to Standard RS232 but in TTL/CMOS Swing Level
  • Supports 2,500Vrms Isolation for TTL/CMOS Signals
  • Easy Serial Port Expansion over USB Port
  • USB1.1 and USB2.0 Forward Compatible
  • Built-in FTDI USB UART Chip
  • Supports Serial Speed from 300bps to 921.6Kbps
  • Supports 7,8 Data Bits
  • Odd, Even, Mark, Space, None parity mode
  • Supports 1, or 2 Stop Bits
  • Supports Win98, Me, XP, CE, 2000, 2003, 2008 Win 7, Vista, Win 8, 10 Linux and Mac OS


  • Fully compatible with USB 1.1 and forward compatible with USB 2.0

Form Factor

1.77”(L)x1.65”(W)x1.15”(H) (4.49 x 4.18 x 2.20 cm)

TTL / CMOS Serial Port

Supports one 5-pin Terminal Block TTL / CMOS RS232 Serial port snd the key benefits are:

  • Logic Levels: Selectable by a DIP Switch
  • Supports 2,500Vrms Isolation for TTL/CMOS Signals (TXD, RXD, GND)
  • Data Bits: 7, 8
  • Stop Bits: 1, 2
  • Parity: None, Odd, Even, Mark, Space
  • Baud Rate: 300bps to 921.6Kbps

Power Requirements

USB Bus Powered, no External Power Supply Needed.
+2.5V or +1.8V DC Power Input Required on the 5-pin Terminal Blocks in case of Supporting 2.5V or 1.8V Logic Levels


  • Operating Temp.: -40 to 85°C (-40 to 185°F)
  • Storage Temp: -40 to 85°C (-4 to 185°F)
  • Operating Humidity: 5 to 95% RH
Important Technical Information:

USB to RS232 Isolated TTL | CMOS Adapter Cable with TB

USB to RS232 Isolated TTL | CMOS Adapter Cable with TB - Image A
USB to RS232 Isolated TTL | CMOS Adapter Cable with TB - Image B
USB to RS232 Isolated TTL | CMOS Adapter Cable with TB - Image C