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Level Conversion Between CMOS And RS232

Discussion in 'General Electronics' started by James Harlacher, Aug 16, 2003.

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  1. Hi,
    I am trying to find a CMOS chip which can perform conversion
    between RS232 and CMOS levels. I've heard of the MAX232 chip but
    havent found documentation and I dont know if it is CMOS or TTL. If
    anyone knows of such a chip, or if the MAX232 is CMOS, Id appreciate
    the info.
  2. wpa

    wpa Guest

    look (amongst others cause many deliver that ic) at for
    datasheet of max232. (also can order some samples there)

    TTL can drive cmos so no problem there. Ohter way around use open collector
    outputs with pull-ups to +5V for the TTL
  3. Ardent

    Ardent Guest



    Nov 10, 2010
    hey ,
    max232 performs ttl to rs232 level conversion.But are rs232 levels compatible with cmos levels?
  5. barathbushan


    Sep 26, 2009
    you can use max 232 to convert to TTL logic , which is as good as the coms logic
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