Subject: Re: ibischk3 ver 3.2.8 and Open_drain
From: Ingraham, Andrew (Andrew.Ingraham@compaq.com)
Date: Thu Jan 10 2002 - 07:51:13 PST
Looking at your data, I suspect there is something wrong with the I-V
tables.
I would expect an open-drain output to go to V_fixture (3.3V) when OFF.
Yet the I-V curves suggest it only reaches 1.15V when OFF.
Also it is very suspicious that the waveform starts at 1.15V (with the
output steady-state ON), but the I-V curves suggest the same exact value
when OFF. Sounds to me like something is backwards.
I don't think there is anything wrong about having both [POWER Clamp]
and [GND Clamp] with an open-drain output.
Regards,
Andy
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