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

 
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Spehro Pefhany
Guest
Posted: Thu Jan 27, 2005 12:33 am    Post subject: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
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
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com

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Ian Stirling
Guest
Posted: Thu Jan 27, 2005 12:52 am    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
Quote:
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.
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Pat Ford
Guest
Posted: Thu Jan 27, 2005 1:17 am    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
"Spehro Pefhany" <speffSNIP@interlogDOTyou.knowwhat> wrote in message
news:n9ofv0piek3uujb6jbg8mu473gktf5cac6@4ax.com...
Quote:
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
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers:
http://www.trexon.com
Embedded software/hardware/analog Info for designers:
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

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Spehro Pefhany
Guest
Posted: Thu Jan 27, 2005 1:56 am    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
On 26 Jan 2005 18:52:51 GMT, the renowned Ian Stirling
<root@mauve.demon.co.uk> wrote:

Quote:
In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
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.

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
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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Ian Stirling
Guest
Posted: Thu Jan 27, 2005 6:03 am    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
Quote:
On 26 Jan 2005 18:52:51 GMT, the renowned Ian Stirling
root@mauve.demon.co.uk> wrote:

In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
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.

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.
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Spehro Pefhany
Guest
Posted: Thu Jan 27, 2005 6:23 am    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
On 27 Jan 2005 00:03:02 GMT, the renowned Ian Stirling
<root@mauve.demon.co.uk> wrote:

Quote:
In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
On 26 Jan 2005 18:52:51 GMT, the renowned Ian Stirling
root@mauve.demon.co.uk> wrote:

In sci.electronics.design Spehro Pefhany <speffSNIP@interlogdotyou.knowwhat> wrote:
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.

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.

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
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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Paul Burke
Guest
Posted: Thu Jan 27, 2005 2:21 pm    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
Spehro Pefhany wrote:

Quote:
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
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Boris Mohar
Guest
Posted: Thu Jan 27, 2005 7:00 pm    Post subject: Re: 0.025" (0.635mm) cable/IDC connectors- reliability? Reply with quote
On Wed, 26 Jan 2005 13:33:23 -0500, Spehro Pefhany
<speffSNIP@interlogDOTyou.knowwhat> wrote:

Quote:
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
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