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Janos Pinczes , 11-26-2024, 10:58 AM

Hello,
I need some advice, how to choose or connector suggestion. Based on the Advanced Digital Hardware Design course Phil's use two Mezzazine connector (BA41-80BT-1-PHB) to transfer differential pair signals.
According to my plan, the connector needs to be HDMI signal compatible (100Ohm diff and 50 single). Other PCB design using ASP-134488-01 connector, but it is huge for me.
Any suggestion or part number for HDMI comaptible connector?
Thank you,
Janos

Janos Pinczes , 11-26-2024, 01:36 PM

Advanced Digital Hardware Design course change Mezzanine connector to HDMI compatible Board2Board co

Janos Pinczes , 12-17-2024, 03:47 PM

No suggestion?

Janos Pinczes , 12-17-2024, 03:48 PM

@Phil Maybe you can help me?

QDrives , 12-17-2024, 04:11 PM

So what is your question exactly?
What do you need? A connector - sure. 50 ohm single ended - not problem. How many pin? Height? Length? Width? Cost? Board-to-board? Stacking height?
There are so many to choose from https://www.digikey.nl/en/products/filter/rectangular-connectors/arrays-edge-type-mezzanine-board-to-board/308

Janos Pinczes , 12-31-2024, 06:48 PM

80Pins B2B connector. Replace the (BA41-80BT-1-PHB) connector with same parameters (height, width) or close to it. Price need to be under 2$, mainly from JLCPCB.

QDrives , 12-31-2024, 08:19 PM

So you are just looking for a cheaper alternative?

Janos Pinczes , 01-02-2025, 11:12 AM

Nope, I can not find (BA41-80BT-1-PHB) is 100 Ohm diff impedanced connector or not. For HDMI it needs to be 100 Ohm, but I don't know will hdmi work with this connector or I need to change it to other.

Robert Feranec , 01-02-2025, 11:38 AM

For B2B I normally use SAMTEC, but they are expensive. However they have some with GND planes. https://www.samtec.com/high-speed-board-to-board/dual-row-mezzanine-strips/qpairs/ PS: I have seen many boards working fine even if B2B connector doesn't meet the specific impedance of interface, but I am not sure how much it can damage the signal. I have never tried to measure it.