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ADuM3223, input logic of VIA VIB when High-Z

Question asked by usaghi on Aug 20, 2013
Latest reply on Aug 24, 2013 by usaghi

Hi,

 

How VIA and VIB status would be, when connecting circuit to them is High-Impedance.

 

More detail.

Signal chaining is, [MCU PWM output] >> [three state buffer] >> [VIA and VIB of ADuM3223].

We have already made prototyping PCB, but do not apply pull-up/down at these pins( VIA and VIB ).

We would like to know what logic level of VIA and VIB would be or undefined, when we make above three state buffer to high-impedance in case of detecting some faults.

In other words, if VIA and VIB is pull-up/down internally, it would be much better for us.

 

Please confirm and Best Regards,

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