The following figures demonstrate the solution of mismatched order between the output of the device and the

DisplayPort connector for the source using BGA package. Figure 8-7 shows the crossing section between

TDP142-Q1 and connector. Usually, vias are applied to avoid the cross, but using a via can attenuate the signal

integrity. Therefore, the polarity swap can be implemented at the input of TDP142-Q1. Figure 8-8 shows there is

no more crossing section between the TDP142-Q1 and connector, which can minimize the number of vias being

used. Note that the solution is only useful for the source using BGA package.

P

DP0

DP1

DP2

DP3

N

P

N

DP0P

DP0N

DP1P

DP1N

DP2P

DP2N

DP3P

DP3N

DP0P

DP0N

DP1P

DP1N

DP2N

DP2P

DP3N

DP3P

DP0P

DP0N

DP1P

DP1N

DP2N

DP2P

DP3N

DP3P

TDP142

Connector

P

N

P

N

GPU-BGA package

Figure 8-7. Layout Example: Signal Crossing on the Output

P

DP0

DP1

DP2

DP3

N

P

N

DP0P

DP0N

DP1P

DP1N

DP2P

DP2N

DP3P

DP3N

DP0P

DP0N

DP1P

DP1N

DP2N

DP2P

DP3N

DP3P

TDP142

P

N

P

N

DP0P

DP0N

DP1P

DP1N

DP2N

DP2P

DP3N

DP3P

Connector

GPU-BGA package

Figure 8-8. Layout Example: INDP2 and INDP3 Polarity Swap

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TDP142-Q1

SLLSG10 – NOVEMBER 2024

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