0.025" (0.635mm) cable/IDC connectors- reliability?

[Spehro Pefhany]

Hi,

Any info on reliability and ruggedness of 0.025" pitch flat cable and
associated IDC connectors (0.05 x 0.05") compared to 2.0mm x 2.0mm
(with 1.0mm pitch flat cable)?



Best regards,
Spehro Pefhany

 

[Ian Stirling]

Hi,

Any info on reliability and ruggedness of 0.025" pitch flat cable and
associated IDC connectors (0.05 x 0.05") compared to 2.0mm x 2.0mm
(with 1.0mm pitch flat cable)?

Well, at 133Mhz, infinitely better.

 

[Pat Ford]

Hi,

Any info on reliability and ruggedness of 0.025" pitch flat cable and
associated IDC connectors (0.05 x 0.05") compared to 2.0mm x 2.0mm
(with 1.0mm pitch flat cable)?



Best regards,
Spehro Pefhany

http://www.speff.com

Hey Speff:
We use them on our F18 module for analog signals and power to the
insturmentation inside a windtunnel They haven't seemed to mind the
vibration, or temperature spikes ( we can pressurize the test section to
over 200psi, this causes a big spike, then at shutdown there is a big dip in
temp), or the repeated connecting disconnecting.
For stress reliefs we used hot melt glue, makes a big difference.
Pat

 

[Spehro Pefhany]

Well, at 133Mhz, infinitely better.

How so? The specs don't look that much different to me (other than the
fact the unbalanced Z is a bit high for my circuit on the some of the
2mm stuff (and perhaps more variable between suppliers), and Z right
on or a bit low is much better).

Z0, C/ft, L/ft, and propagation delay are all within 10-20% of each
other under the same conditions.


Best regards,
Spehro Pefhany

 

[Ian Stirling]

How so? The specs don't look that much different to me (other than the
fact the unbalanced Z is a bit high for my circuit on the some of the
2mm stuff (and perhaps more variable between suppliers), and Z right
on or a bit low is much better).

Oh dear.
Please ignore me.
I was having a particularly stupid moment, and misread IDC for IDE, and
somehow further on the difference between 80 and 40 conductor cables.
I blame the drink.
Well, I'd like to, if I'd had any.

 

[Spehro Pefhany]

Oh dear.
Please ignore me.
I was having a particularly stupid moment, and misread IDC for IDE, and
somehow further on the difference between 80 and 40 conductor cables.
I blame the drink.
Well, I'd like to, if I'd had any.

Hey, no problem. I was just about to ask if it was actually that fancy
50-ohm micro-coax you were referring to (with AWG38 inner conductors).
Let's say it was.


Best regards,
Spehro Pefhany

 

[Paul Burke]

Any info on reliability and ruggedness of 0.025" pitch flat cable and
associated IDC connectors (0.05 x 0.05") compared to 2.0mm x 2.0mm
(with 1.0mm pitch flat cable)?

I have used the ODU range of 0.025" IDCs in a small way, and they are an
absolute bugger to close up accurately. If they survive this process,
they seem rugged enough- there's one plugged very frequently just by me,
it's on my MSP430 serial programmer.

Paul Burke

 

[Boris Mohar]

Hi,

Any info on reliability and ruggedness of 0.025" pitch flat cable and
associated IDC connectors (0.05 x 0.05") compared to 2.0mm x 2.0mm
(with 1.0mm pitch flat cable)?

Many years ago I used 0.025" pitch, 14 wire ribbon on new instrument module.
This module was particularly temperamental (1fA electrometer) and we had to
frequently remove, clean and handle them. The connector never failed. We
used the proper tool to install it. Much later I discovered that the wire in
the ribbon was sold gauge.

--
Boris Mohar



Regards,

Boris Mohar

Got Knock? - see:
Viatrack Printed Circuit Designs (among other things) http://www.viatrack.ca