SN75DP139

John11513

Expert 5480 points

Other Parts Discussed in Thread: SN75DP139

Hi,

I am designing with SN75DP139. Could you pls provide me the schematic and PCB layout reference design of this part?

Thanks,

over 13 years ago

0 Ken Shaw over 13 years ago

TI__Expert 6745 points

Attached are two different reference schematics for the DP139 in a GPU source application supporting with an HDMI interface or DVI. For layout, I would suggest looking over the HS layout guidelines. What is your application? The 139 should be placed close to the final TMDS interface for best signal integrity at the customer interface (DVI or HDMI). SMT connectors are always encouraged for minimal signal discontinuities.

0830.Texas_Instruments_DisplayPort_Design_Guide_Rev1.1.pdf

1373.SN75DP139_REFERENCE_SCHEMATIC_HDMI_Rev_C.pdf 7536.SN75DP139_REFERENCE_SCHEMATIC_DVI_Rev_C.pdf

0 John11513 over 13 years ago in reply to Ken Shaw

TI__Expert 5480 points

Thank you. It is helpful.

0 Tony51646 over 11 years ago in reply to Ken Shaw

Intellectual 270 points

Hi Ken,

I use SN75DP139 in my design, but during layout, I found that the chip can't be directly connect to HDMI connector. The P trace and N trace have to be swaped.

Do you know the reason? Do you have a reference layout you can share with me?

Thanks,

Tony

0 Ken Shaw over 11 years ago in reply to Tony51646

TI__Expert 6745 points

Tony,

If your design allows, you can actually swap p/n on the input and then swap again on the output if that helps.

0 Tony51646 over 11 years ago in reply to Ken Shaw

Intellectual 270 points

Hi Ken,

I don't want to add vias on high speed lines. Do you have a reference layout which you can share me?

Thanks,

Tony

0 Ken Shaw over 11 years ago in reply to Tony51646

TI__Expert 6745 points

The reference board we have swaps the input pins and the output pins with no vias. Just to be clear, the input DP main link input 3n is connected to pin 48 of the RGZ package which is label as the "IN_D4+" signal. DP main link input 3p would be connected to pin 47 which is the "IN_D4-". As you can see the input signals are swapped. The output is also swapped. "OUT_D4+", pin 13, would be connected to pin 12 of the HDMI connector for signal TXCn and "OUT_D4-", pin 14, would be connected to pin 10 of the HDMI connector for signal TXCp.

0 Tony51646 over 11 years ago in reply to Ken Shaw

Intellectual 270 points

Hi Ken,

I may misunderstand your points.

Do you mean that I can use

IN_D3+ for DP_L2-

IN_D3- for DP_L2+

OUT_D3+ for HDMI_TX0-

OUT_D3- for HDMI_TX0+?

Is my understanding correct?

Thanks,

Tony

0 Ken Shaw over 11 years ago in reply to Tony51646

TI__Expert 6745 points

DP input: from sink connector J1

ML_IN0_N = J1,10 to cap to U1,39

ML_IN0_P = J1,12 to cap to U1,38

ML_IN1_N = J1,7 to cap to U1,42

ML_IN1_P = J1,9 to cap to U1,41

ML_IN2_N = J1,4 to cap to U1,45

ML_IN2_P = J1,6 to cap to U1,44

ML_IN3_N = J1,1 to cap to U1,48

ML_IN3_P = J1,3 to cap to U1,47

TMDS Output to HDMI Connector J2

TMDS_SINK_CLK_N = J2,10 to U1,14

TMDS_SINK_CLK_P = J2,12 to U1,13

TMDS_SINK_D0_N = J2,7 to U1,17

TMDS_SINK_D0_P = J2,9 to U1,16

TMDS_SINK_D1_N = J2,4 to U1,20

TMDS_SINK_D1_P = J2,6 to U1,19

TMDS_SINK_D2_N = J2,1 to U1,23

TMDS_SINK_D2_P = J2,3 to U1,22

0 Pixeldna over 11 years ago in reply to Ken Shaw

Prodigy 40 points

HI Ken,

Can I get ibis or hspice model files for this sn75dp139 chip?

Regarding the Receiver equailization, may I know how much in db? If I have a cable between DISPLAYPORT source and SN75DP139 input how much cable length Receiver Equilizer can recover?

Thanks in advance,

0 Pixeldna over 11 years ago in reply to Ken Shaw

Prodigy 40 points

Ken, One more question. Do we need ac coupling capacitors on reciever side? Are those must be on source/ tx side?

Thanks,

0 Chee-Boon Lim over 10 years ago in reply to Ken Shaw

Intellectual 325 points

Hi Ken,

Could I have the PCB layout files and BOM for the SN75DP139 DP/HDMI/DVI Ref Design? I have a customer who would like to refer to this.

Thank You very much

Best Regards,

Chee Boon

0 Jose Carlos Gil over 10 years ago in reply to Chee-Boon Lim

TI__Genius 9315 points

Hi Chee-Boon

In the next link you can find layout files & schematics.

https://sps04.itg.ti.com/sites/ibu/cci/CCI%20Product%20Information/Forms/AllItems.aspx?RootFolder=%2Fsites%2Fibu%2Fcci%2FCCI%20Product%20Information%2FDP%20Devices%2FDP139&View=%7bFEBB1BE2-AA77-4741-A70D-1923ECD98CC5%7d

Regards.

0 Chee-Boon Lim over 10 years ago in reply to Jose Carlos Gil

Intellectual 325 points

Hi Jose,

Can you verify that the link you posted is correct? It appears to be broken.

If possible, I would like to have the BOM as well.

Thank You

Best Regards,

Chee Boon

0 Jose Carlos Gil over 10 years ago in reply to Chee-Boon Lim

TI__Genius 9315 points

Hi Chee-Boon.

The link is OK, maybe you're not authorized to access that link.
Since this is sensitive information, we can not share on open forum, so please, send me an e-mail with all the information about business case so I can share with you that information needed. (Also BOM).

Best regards.
JC

JoseCarlos.Gil@ti.com

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SN75DP139