LMH0397: OUT0 pins

brian moore48

Part Number: LMH0397
Other Parts Discussed in Thread: DS25CP104A

In the LMH0397, are the OUT0+/- pins tri-stateable? I only have one diff pair available for SDI in or out to my host board, so I want to know if the OUT0+/- pins can be bussed together with the IN0+/- pins. so that when I want to input SDI to the IN0 pins, I would need the OUT0 pins to be tri stated.

over 1 year ago

0 Nasser Mohammadi over 1 year ago

TI__Guru* 93670 points

Greetings,

At this data rate bussing differential pairs is not recommended. Parasitic can effect signal integrity. Please consider using a small cross point such as DS25CP104A to isolate outputs from one another.

Regards, Nasser

0 brian moore48 over 1 year ago in reply to Nasser Mohammadi

Prodigy 100 points

Hi Nasser. I am aware of parasitics, but can you answer my question, is the otu0 output tri stateable? I would consider a xpoint switch as you suggest but unfortunately unlike your competitors, your part does not have any GPIOs to control the switch, and I would have to have add a separate control for it. If the out0 can be tri stated, I'd want to try it to see if I can tolerate any SI issues that may result. Space is at a premium in my layout.

Regards, Brian

0 Nasser Mohammadi over 1 year ago in reply to brian moore48

TI__Guru* 93670 points

Hi Brian,

Yes when OUT0 disabled it is tri-stated.

Regards, Nasser

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LMH0397: OUT0 pins