SN65LVDS31-EP: About TVS Diode

Nam Yeongjun

Part Number: SN65LVDS31-EP
Other Parts Discussed in Thread: ESD122

I am trying to protect the Y/Z output pins of the SN65LVDS31MDREP from ESD using a TVS diode.
Are there any ESD devices recommended for this output?
If not, do you have any information, such as the allowable voltage, needed for selecting the external TVS for the Y/Z pin?

1 month ago

0 Brandon Fisher94 1 month ago

TI__Mastermind 29225 points

Hi Nam,

Welcome to the E2E forums.

There are some recommendations in the System-Level ESD Protection Guide that are specific to LVDS (see section 3.10).

Those devices seem like good options to me, but just in case I'll move this thread to our protection devices team to see if they have any updated recommendations.

Best Regards,
Brando Fisher.

0 Bryan Rodriguez de San Miguel 1 month ago in reply to Brandon Fisher94

TI__Expert 7770 points

Hi Brandon,

Do we know the abs max ratings of those output pins?

Best,

Bryan

0 Brandon Fisher94 1 month ago in reply to Bryan Rodriguez de San Miguel

TI__Mastermind 29225 points

Bryan,

The Y/Z pins could tolerate VCC + 0.5 or 4.5V in the ABS max case for VCC.

Best Regards,
Brandon Fisher.

0 Nam Yeongjun 1 month ago in reply to Brandon Fisher94

Prodigy 30 points

If the allowable maximum voltage is around 4V, is the ESD122 IC you provided not suitable for protection because its Vcl is at least 6.4V?

+1 Bryan Rodriguez de San Miguel 1 month ago in reply to Nam Yeongjun

TI__Expert 7770 points

Hi Team,

Nam you are correct. This is a scenario where we would require a deep snapback diode which we do not have in our portfolio yet. We are releasing a device with this technology next year, but as of now we do not have a solution.

Best,

Bryan

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SN65LVDS31-EP: About TVS Diode