RS232 to TTL adapters?


#1

What happened to R232 TO TTL CONVERTER MODULE 1597-1306-ND? I bought about 20 over the past few years, but now they are gone. They have a DB9, a SIP4, and a MAX232.

Is there a substitute? They are very convenient for quick prototypes.


#2

Hello @lslarry86,

It looks like the manufacturer obsoleted the part.

1286-1032-ND may be a good part to look at.
image


#3

Nice, thank you. I searched for a minute but could not find the new part.


#4

There are a few other versions available @ Digi-Key, some cheaper (especially if you don’t need 3.3V compatibility) and some nicely hackable to add features.

This one from Schmartboard Inc. I like to hack to add screw terminals on top of the DE-9 and also separate out the CTS/RTS to use as a second Tx/Rx pair.
https://www.digikey.com/product-detail/en/schmartboard-inc/710-0001-01/1988-1027-ND/9559310

This unit from MikroElektronika is the least expensive 3.3V compatible adapter.
https://www.digikey.com/product-detail/en/mikroelektronika/MIKROE-602/1471-1246-ND/4495610

This 5V only one is the least expensive of all.
https://www.digikey.com/product-detail/en/mikroelektronika/MIKROE-222/1471-1148-ND/4495513


#5

Thanks very much. Those three are all classified as “Evaluation and Demonstration Boards” for MAX232 and friends. I did not try that search.