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12/29/02 22:24
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#35206 - RE: Interfacing 3V CMOS with 5V CMOS/TTL
Uumm using a MAX232 chip would be a very very very bad idea as the MAX232 is a 5v chip.

You can however use the MAX3232 which is a 3.3v version of the same chip.

I made a smiliar interface for my Siemens C25 a few years back. I'll see if I can dig up the schematics.

Most designs of such interfaces use a MAX232 with a few doides in between to scale down the voltage.

List of 7 messages in thread
TopicAuthorDate
Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      
RE: Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      
RE: Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      
RE: Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      
RE: Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      
RE: Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      
RE: Interfacing 3V CMOS with 5V CMOS/TTL            01/01/70 00:00      

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