[hpsdr] IC wanted: ULN2003A open collector array

[John Petrich]

Scott and Leon,

Thank you both.  You both are princes.  Ron and I owe you both big time. 
Just completed the order with Jameco for #6 of the IC's.  Jameco is close to 
where I live so it appears that everything is in hand.

Thanks again to Scott and Leon and to the larger reflector community for 
this and help at other times.  It is especially nice that neither of you 
asked what happened.  Suffice it to say that my dog is smarter than I am.

Regards,
John Petrich, W7FU


----- Original Message ----- 
From: "Scott Burris" <slburris at gmail.com>
To: "John Petrich" <petrich at u.washington.edu>
Cc: <hpsdr at lists.openhpsdr.org>
Sent: Tuesday, March 30, 2010 11:08 AM
Subject: Re: [hpsdr] IC wanted: ULN2003A open collector array


How about Jameco?

Says they are in stock.

http://www.Jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&pa=193826&productId=193826&cid=findchips

Scott

On Mar 30, 2010, at 11:01 AM, John Petrich wrote:

> ***** High Performance Software Defined Radio Discussion List *****
>
> Ron Cox, W9KFB, and my self are both looking this IC for Penelope to 
> replace defective ones.  (don't ask)  The usual suppliers, Allied, Mouser, 
> and DigiKey, are all out of stock.  The IC is the open collector driver 
> for the DB-25 output pins on Penelope, a ULN2003A is specified as the open 
> collector array.  This IC is the tiny 16 pin SOIC that is located 
> physically adjacent to the DB-25 connector on the Penelope board.
>
> Does anyone have a few of these IC's  for sale, or know of a supplier who 
> might have some in stock?
>
> Would anyone know if it would be possible to substitute the ULN2004A, for 
> the ULN2003A?  The ULN2004A is specified to link directly with CMOS 
> devices that supply 6 to 15 volts.  Is there enough drive from our 5 volt 
> bus to make the ULN2004A change state?
>
> I'm leaving town for Easter, but Ron will be watching the reflector.  Any 
> help is appreciated.
>
> Regards,
> John Petrich, W7FU
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