SN75DP139: I2C_EN pin setting for DVI application

Roy

The DP139 is has an internal I2C slave (adaptor) that gets enabled when I2C_EN is H. I don't know how the source will respond if it tries to read the I2C slave and see the DP139 is a HDMI adapter. 

Instead I2C_EN, can they try to change the VSADJ and see if it helps with the rise/fall time?

What do they have on the DVI output that they need faster rise/fall time? 

Thanks

David

Hi David,

They adjusted Vsadj and used the smallest value that the datasheet recommends (3.65kohm), but still they were not able to pass compliance test.

Please see the report attached. I'll also send the schematic to you in a private mail.

https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/138/DVI_5F00_20220330.7z

Thanks!

Roy

Roy

Are they able to pass the compliance test if they removed the ESD? And have they tried to put the 100 ohm serial resistor on the differential output?

Thanks

David

Hi David,

I'll ask the customer to try those out. By the way, is there a reference schematic for the SN75DP139?

Thanks!

Roy