LMH0344: LMH0344 question

user6392260

Part Number: LMH0344
Other Parts Discussed in Thread: DS25CP104A, LMH0324, LMH0356

Hi TI expert,

I want to use 4 LMH0344 to do 4 HD SDI inputs, and control the MUTE of these 4 IC through GPIO to achieve the function of selecting the output of 1 channel. However, the output of HD SDI of 4 channels IC needs to be all connected in parallel. Is there any interference?

over 4 years ago

0 Nasser Mohammadi over 4 years ago

TI__Guru* 93670 points

Greetings,

At 3Gbps data rate, we should not connect outputs in parallel.

Suggestion is to use four LMH0324 or LMH0344 and then send outputs to DS25CP104 - 4X4 LVDS cross point. LMH0324 has better performance and lower power consumption than LMH0344.Also, instead of DS25CP104A, you can consider using LMH0356 - 4-inputs SDI retimer.

Below are links to LMH0324, DS25CP104, and LMH0356 Data sheets:

https://www.ti.com/lit/ds/symlink/lmh0324.pdf?ts=1605808264048&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fdocs%252Funiversalsearch.tsp%253FsearchTerm%253Dlmh0324

https://www.ti.com/lit/ds/symlink/ds25cp104a.pdf?ts=1605808305008&ref_url=https%253A%252F%252Fwww.ti.com%252Fsitesearch%252Fdocs%252Funiversalsearch.tsp%253FsearchTerm%253Dds25cp104

https://www.ti.com/lit/ds/symlink/lmh0356.pdf?ts=1605808343517&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMH0356%253FkeyMatch%253DLMH0356%2526tisearch%253DSearch-EN-everything%2526usecase%253DGPN

Regards,, Nasser

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LMH0344: LMH0344 question