Is there any ic like MAX232 that can level shift 3.3v TLL to RS232?

I need it to debug a pic running on 3.3 V with my pc.

  • 1
    \$\begingroup\$ Yes, there's a 3v3 version of the MAX232, it's on Maxim's website and everything. \$\endgroup\$ – John U Aug 15 '13 at 15:12
  • \$\begingroup\$ @JohnU i couldn't find it. link me \$\endgroup\$ – Hassan Nadeem Aug 15 '13 at 15:38
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    \$\begingroup\$ MAX3232 - should be what you're looking for. \$\endgroup\$ – Tom L. Aug 15 '13 at 15:44
  • \$\begingroup\$ @TomL. along with a description that it's a 3.3v compatible version and maybe a link and a few details on the voltage range etc you could post that as an answer - it does seem to be the obvious answer. \$\endgroup\$ – PeterJ Aug 15 '13 at 15:54
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    \$\begingroup\$ Look again - the MAX3232 is a 3v-to-RS232 driver, it will tolerate 3 to 5.5v supply. \$\endgroup\$ – John U Aug 16 '13 at 14:11

I would just purchase a TTL to 232 cable from FTDI.

It plugs into your USB port and you use Termite or whatever your flavor may be and start on your debug.

Below are the links.



you can get it for $20 @ digikey


I use this on every design. Just run the TTL lines to a header and you are good to go.

Good luck!


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