SN65LVDT33: Could the differential input be floated if the channel is not used?

Xiang Maverick

Part Number: SN65LVDT33
Other Parts Discussed in Thread: SN65LVDS31-EP, SN65LVDS33-EP

1) Could the differential input of SN65LVDT33-EP be floated if the channel is not used? Is SN65LVDT33-EP orderable since I do not find it in the part number list when creating this thread?

2) Could the input of unused the channel of the related part SN65LVDS31-EP be floated if the channel is not used?

over 2 years ago

0 Clemens Ladisch over 2 years ago

Guru 279910 points

A device named "SN65LVDT33-EP" does not exist. There is only the SN65LVDS33-EP without integrated termination resistors.

Unused inputs must not float. For the SN65LVDS33-EP, the unused A/B inputs should be shorted (directly or with a termination resistor) so that the failsafe makes the output high. For the SN65LVDS31-EP, you can leave an unused A input open; it has an integrated pull-down resistor and will not float.

0 Xiang Maverick over 2 years ago in reply to Clemens Ladisch

Intellectual 750 points

1) Do you mean I should connected A and B directly or with a termination resistor?

2) Can I connected A and B directly and connect them to ground?

Thank you

+1 Clemens Ladisch over 2 years ago in reply to Xiang Maverick

Guru 279910 points

1. Yes.

2. Yes, 0 V is a valid input voltage.

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SN65LVDT33: Could the differential input be floated if the channel is not used?