Board to board connector with jumpers

[wigman27]

Hi,

I am currently designing a project that I am hoping to make modular and require some board to board connectors, I have had a look at a few other threads on here that discusses this and they are great but I need mine to have jumpers. Sometimes I will want to make the connection and sometimes I don't.

I am trying to combine the connector and the jumpers into one device. I am currently looking at using these and soldering them to the board.

Connector

Jumper

At the moment I need approximately 24 connections and will have a maximum clock signal of about 30MHz.

Is there a better option?

Lee

[mariush]

If they're good enough for USB 2.0 and USB 3.0, they'll probably be OK for connecting your boards.

[void_error]

It's probably the cheapest way too. The maximum clock signal you can push through depends mostly on your PCB design (and the devices used, of course). A good practice is to keep the high speed traces short.

[wigman27]

It's probably the cheapest way too.

Cheapest isn't really my preference in this particular case so if you know of an alternative then I would be happy to hear it!

A good practice is to keep the high speed traces short.

What sort of frequency would you consider high speed? when does it cross that "boundary"?

[void_error]

What sort of frequency would you consider high speed? when does it cross that "boundary"?

There's no defined boundary, since it depends on a particular case. Every PCB trace (or piece of wire) has resistance and inductance, and two adjacent traces form a capacitor. At low frequency this usually doesn't matter. The signal source's output resistance might also matter.

[tszaboo]

It's probably the cheapest way too.

Cheapest isn't really my preference in this particular case so if you know of an alternative then I would be happy to hear it!

A good practice is to keep the high speed traces short.

What sort of frequency would you consider high speed? when does it cross that "boundary"?

Samtec has some measurement reports on their similar connectors. I remember it is in the "few GHz" region for the -3dB.

[David Hess]

Those are the type of connectors I would use.

Pin headers with 0.1 inch spacing are good enough for clean 100 MHz performance in oscilloscope vertical amplifiers so they are good to at least 500+ MHz when used appropriately.