Other Parts Discussed in Thread: AM3715, TXB0108
Good morning,
I am designing a board and I need to convert the AM3715 JTAG signals to 3.3V for boundaring scan purpose. In order to guarantee a nice waveform I perform a signal integrity simulation.
In this simulation I found that the rise and fall time of the TXB0108 device are very very slow (about 50 ns or higher). I though that the problem was the capacitive load of the AM3715 device but I checked it and it has 2.2pF.
On the other hand I checked the TXB0108 data sheet and I found that the fall and rise time at 1.8V is 5.1ns maximum in port A.
Finally I performed the same simulation with TXS018E and the waveform was nice. So I assume that the TXB0108 IBIS model doesn`t work correctly. Am I right?
Could you please confirm this item? In case that the IBIS model doesn`t work correctly, could you please send me the IBIS model corrected?
Best Rregards,
Alberto
