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R232 TTL Converters | RS232 to TTL Cables
RS232 Converter Cables

RS232 Converter Cables

Providing two way RS232 serial communication signal conversion

Our converter cables provide two way RS232 serial communication signal conversion between the TTL output (such as a microcontroller board, like the Arduino) to and from a personal computer RS232 Serial COM port. This converter can be used on any microcontroller which has TTL serial communications that needs to be converted to RS232. We have also expanded our cables to include USB to TTL.

Need RS232 to TTL converters? Visit our online store for great deals on these cables.

Our standard cables are equipped with female DB9 connectors but male variants are available. The female cables will plug directly into common RS232 ports. The cable converts the 0V and 5V TTL signal to the -12V and 12V RS232 serial signal. The circuitry is all inside the cable itself!

The Schematic

The converter cables are based on the MAX232 RS-232 converter from Texas Instruments. The circuit receives power from the TTL end of the cable and takes the 3.3V / 5V TTL signal and converts it to the RS232 signal. The transmit and receive pins for the schematic are determined by the gender of the RS232 cable.

Cable Types

Type 1

RS232 to TTL signal converter serial cable (Tx, Rx, +5V, Gnd). It is a serial cable with a single 4-pin header for mounting on a microcontroller board. This type of cable does not have handshaking.

Type 2

RS232 to TTL signal converter serial cable (Tx, Rx, +5V, Gnd). It is a serial cable with two 2-pin connectors for mounting on a microcontroller board. One 2-pin connector for power and one 2-pin connector for data. This type of cable does not have handshaking.

Type 3

The type 3 cable is our handshaking cable. It has a type 1 4-pin friction lock connector for power and data and a single 2-pin connector for RTS and CTS handshaking.


Custom Cables

We can also make cables custom to your specifications! We can customize the cables to your needs. Many customers don’t want the standard Type 1, 2 or 3 connectors we stock. We can make cables to order. A large percentage of our cable orders are custom. Usually customers just want the TTL side changed to plug directly into their device, but we can also customize the RS232 connector and circuitry. We can customize this cable to fit you RoboteQ Motor controller so you can control it from you microcontroller. Contact us with your requests!

Custom Cables
These RS232 to TTL converters provides two way RS232 serial 
communications signal conversion between the TTL (Transistor Transistor Logic) output (from a PIC) to and from a personal computer RS232 serial COM port or even to your motor controller.
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