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SATA signals and daughterboard

Hi,

I'm wondering if there are any issues with routing SATA signals from a main board to a daughterboard that's connected with standard pin headers and sockets(similar to those found in 2.5" IDE interfaces) on

4 layer boards? I'm looking at both SATA 1.5Gbps and 3.0Gbps. If there are issues how serious is it?

Thanks.

Reply to
galapogos
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galapogos snipped-for-privacy@gmail.com posted to sci.electronics.design:

On the face of it, ide type connectors are for 100 MHz class signals, SATA is 1.5 or 3.0 GHz class. I would expect problems, they may be solvable or not.

Reply to
JosephKK

Thanks. Any recommendations for board to board connectors for SATA signals then? I've read the SATA specs and they don't seem to have much information on PCB layout/routing/SI issues/etc.

Reply to
galapogos

galapogos snipped-for-privacy@gmail.com posted to sci.electronics.design:

transmission line impedance controlled conectors

Reply to
JosephKK

Thanks. AFAIK SATA signals are LVDS signals with 100ohm termination resistors and a 250mV voltage. What does this means with respect to adding connectors in the signal's path? Does the connector and/or cable simply have to be 100ohms and rated for 3GHz for it to work?

Reply to
galapogos

galapogos snipped-for-privacy@gmail.com posted to sci.electronics.design:

The fine detail of correctly designing the connectors and cables is usually best left to the experts (i am not all that expert in such design, just good enough to reality check the things). I can check the basic design, spacing, shielding, dimensions, impedance discontinuities, etc.,

Reply to
JosephKK

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