TFP401A: Difference between TFP401A and TFP401

Shawn_Wang

Part Number: TFP401A
Other Parts Discussed in Thread: TFP401,

Hi team

What is the difference between TFP401A and TFP401? My customer met the supply issue of TFP401A and I am wondering if TFP401 could be the drop-in replacement.

Let me know if you have any questions.

over 3 years ago

0 David (ASIC) Liu over 3 years ago

TI__Guru**** 187101 points

Hi,

The TFP401A includes HSYNC regeneration circuitry. This was required to be interoperable with the Sil154 that exhibited HSYNC jitter. However, the Sil154 is no longer on the market.

Thanks

David

0 Shawn_Wang over 3 years ago in reply to David (ASIC) Liu

TI__Expert 3811 points

Hi David

So it is working well for the customer to turn to populate TFP401 on their TFP401A board? Do you need their schematic and connection to determine it?

0 David (ASIC) Liu over 3 years ago in reply to Shawn_Wang

TI__Guru**** 187101 points

Hi,

It depends on the DVI transmitters. Some DVI transmitters introduce jitter on the transmitted HSYNC and VSYNC signals during the TMDS encryption process. The HSYNC signal can shift by one pixel position (one clock) from nominal in either direction, resulting in up to two cycles of HSYNC shift.

If the DVI transmitter does not have this issue, then you can use TFP401.

Thanks

David

0 Shawn_Wang over 3 years ago in reply to David (ASIC) Liu

TI__Expert 3811 points

Hi David

Got it and thanks for your information.

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TFP401A: Difference between TFP401A and TFP401