From: ARiazi (ARIAZI@prodigy.net)
Date: Mon May 29 2000 - 10:55:07 PDT
> Hello everyone.
> Good afternoon.
> What is the Tco measurement point?
> Why I want to know about the Tco measurement point is to get the Vmeas,
Vref, Rref, and etc.
> Please reply me if you know that.
> You are very help.
Tco, which is called Time Clock to Out (or Output Valid), represents the
time from clock rise to Vmeas into a test load.
The reference voltage for timing measurements (Vmeas), has a value in
between the Vinl (input logic low DC voltage), and Vinh (input logic High DC
voltage). For example, When Vinl = 0.8 V, and Vinh = 2.0 V, a good value
for Vmeas is 1.5 V.
Normally, Tco is not present in the model, but it is specified in the
device's datasheet. Tco usually has different values for the Min, Typ and
corners, and is important only for drivers.
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