Re: 1mm pins -- through-hole or SMT?

On Mon, 22 Oct 2007 12:24:11 -0700, malak wrote:
On Oct 22, 12:50 pm, Spehro Pefhany

I see two locating pins (non electrical) and solder tabs to hold it
mechanically. The memory card is held parallel to, and a few mm above,
the PCB.

I assumed from the diagram in the lower-left corner that the bottom
1mm -- consisting of the 200 pins (1mm height at 0.6mm spacing) and
two pieces of plastic approx. 3 mm wide each on the ends -- would be
below the top surface of the PCB, and everything else would be above
it.

This part is a socket/carrier for a memory card, so of course the
memory card itself would be held a few mm above the PCB -- namely at
the dense array of contacts shown in the middle of that same diagram
in the lower-left corner.

I'm not sure what the label "solder tab" means in the bottom middle
diagram -- I'm guessing maybe it's an extra grounding point.

If my assumption is correct about the pins intruding into the top of
the PCB a distance of 1mm, then I'm wondering if this part can be used
in a 1.6mm-thick through-hole PCB.

No, unless you cut rectangular holes for those foot-like projections
on the ears. The pins would just touch the pads, and your solder paste
would make nice little trumpet-shaped fillets. :-)

Cheers!
Rich


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