SN65HVD1781: Fault Protection between A and B bus pins

Mo.

Mastermind 22165 points

Part Number: SN65HVD1781

Hello All,

My customer has the below two questions on the Fault Protection feature of the SN65HVD1781 Device:

1) What is the maximum DC voltage that can be applied between A and B bus pins without damaging the part?

2) What is the maximum AC voltage that can be applied between A and B bus pins without damaging the part?

From what I can see from the datasheet it looks like the fault protection is for voltages applied between one bus pin (A or B) and GND or VCC, but doesn't say anything about protection from voltages applied directly between pin A and B.

Thank you!

Best regards,

Mo.

over 6 years ago

0 Hao L over 6 years ago

TI__Mastermind 25705 points

Mo.,

The abs max voltage difference between A and B is still 70V, since internally A and B share same Vcc/ground. I'm not quite sure what kind of AC condition you were referring to. But I think you should treat A and B like A/B to Vcc/ground in reliability sense. Please let me know if you have any questions.

Regards,
Hao

0 Mo. over 6 years ago in reply to Hao L

TI__Mastermind 22165 points

Hi Hao,

Thanks for the clarification!

BR,
Mo.

Interface

Interface forum

SN65HVD1781: Fault Protection between A and B bus pins