MAX232: Questions of MAX232

The MAX232 has two drivers and two receivers; this is more than needed in that image. There are other transceivers that also work with a 3.3 V supply.

Here is a search for 1+1 transceivers: https://www.ti.com/interface/rs-232/products.html#286=1;1&287=1;1&184nom=3.3;5 (The MAX and TRS devices are identical, SN are older; "E" indicates better ESD protection.)

All these transceivers automatically convert between the logic voltage and the RS-232 bus voltages.

Hi Jimmy,

As Clemens mentioned the MAX232 has more drivers/receivers than you would need - it will work you will just have unused pins. 

The link Clemens posted will take you to some more suitable options.

Please let me know if you have any further questions!

Best,

Parker Dodson