Level Conversion Between CMOS And RS232

[James Harlacher]

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.
Thanks,
James

 

[wpa]

look (amongst others cause many deliver that ic) at www.maxim-ic.com 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

 

[Ardent]

X-No-Archive: yes

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

http://pdfserv.maxim-ic.com/arpdf/MAX220-MAX249.pdf for the MAX232

You can also use the DS275 which is much simpler, does not require
capacitors etc

http://pdfserv.maxim-ic.com/arpdf/DS275.pdf

 

[SNEHAL]

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.
Thanks,
James

hey ,
max232 performs ttl to rs232 level conversion.But are rs232 levels compatible with cmos levels?

 

[barathbushan]

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