Re: Max232 or MAx3232

From: Nico Coesel (nico_at_puntnl.niks)
Date: 11/10/04 

Date: Wed, 10 Nov 2004 20:46:24 GMT

Rich Webb <bbew.ar@mapson.nozirev.ten> wrote:

>On Tue, 09 Nov 2004 20:04:45 GMT, nico@puntnl.niks (Nico Coesel) wrote:
>
>>Paul Burke <paul@scazon.com> wrote:
>>
>>>Joseph Goldburg wrote:
>>>>
>>>> Whats the diff?
>>>>
>>>
>>>That bulbous bit on the back axle of your car.
>>>
>>>But a MAX232 is 5V, MAX3232 3V (ish).
>>
>>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.
>
>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.

2 reasons: they don't work very well as a drop-in replacement
(especially with electrolytic capacitors) and more important, they are
unreliable. We have had a near 100% failure rate in over 100 units
when we used the Sipex part in a warm (40 degrees Celsius inside the
case) environment. No problems with the original Maxim parts. 

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