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Max232 or MAx3232

Discussion in 'Electronic Design' started by Joseph Goldburg, Nov 9, 2004.

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  1. Hi All,

    Whats the diff?

    thanks in advance.

    Joseph
     
  2. Paul Burke

    Paul Burke Guest

    That bulbous bit on the back axle of your car.

    But a MAX232 is 5V, MAX3232 3V (ish).

    Paul Burke
     
  3. Anders F

    Anders F Guest

    LOL. But that's abbreviation too...
    Haven't used RS232 for ages. But check the supply ranges, package/pin out
    and cap requirements....

    /A
     
  4. John Larkin

    John Larkin Guest

    Both are expensive. If you have +-12 supplies, use a cheap level
    shifter.

    John
     
  5. Nico Coesel

    Nico Coesel Guest

    And be sure to never ever ever E V E R get the cheap Sipex version (of
    any chip) or you'll be very sorry.
     
  6. Rich Webb

    Rich Webb Guest

    Why? I've used them in some admittedly not very demanding lab setups
    and have not experienced any problems with them. I have NOT done A-B
    comparisons with the Maxim parts nor scrutinized the waveforms but
    they've worked OK for me up to 155 kBaud.
     
  7. I had a MAX3232-equivalent quit on me in a lab environment (hot
    plugging, but that's normal on RS-232). Actually, IIRC, it was the ST
    version of that chip.


    Best regards,
    Spehro Pefhany
     
  8. Ken Smith

    Ken Smith Guest

    I've seen the MAX232 smoke under a hot plugging situation. It happened
    often enough that we added resistors to the input and output lines. We
    gave up a little drive but the chips failed a lot less. The transmitter
    only seemed to need 100 ohms to keep it alive.
     
  9. Ken Smith

    Ken Smith Guest

    Yes, use the other 2 sections of that LM324 :>


    BTW: I have to admit I really did use an LM324 as the RS232 buffer once.
    We were counting chips.
     
  10. Rich Grise

    Rich Grise Guest

    What kind of bitrate did you get, if you don't mind my asking?

    Thanks,
    Rich
     
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