Subject:
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Max232CPE Substitutions
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Fri, 1 May 1998 23:21:47 GMT
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Original-From:
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Mike Davis <ipscone@halcyon.IHATESPAMcom>
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Viewed:
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1450 times
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I used a Max202 in place of the Max232. I installed it with the 10uF
caps.
Since the 202 can be used with .1 and I already installed the
10uF ones. I decided to switch it for a 232. The 202 checked out (V
wise) like the installation instructruction testing.
I had a bag of Max232CPE from Active that actually had DS14C232
inside. I installed one and everything checked out except that the
step (3.2.2) that required measuring 9-10V at pin 3 of J9 (while
shorting pin 6 to pin 10) actually measured slightly under 5V.
I tried a different Max232 chip and none of these other chips read
9-10 V. They were actually between 0 and 5 V.
Is this still acceptable or do I really need 9-10 V? These parts are
supposed to be equivelant.
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