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rkrutz
12-29-2009, 12:21 AM
I was wondering if anyone new which ic had the house codes of MC14528BCP and FFNC9051. It has 8 legs on each side. From my research I believe it ay be a xr2240, but I'm not sure. Thanks for your help.

SgtWookie
12-29-2009, 12:34 AM
An MC14528BCP is a Motorola part number for a 4000-series 4528 CMOS dual monostable multivibrator. Other manufacturers might use CD or HEF instead of MC1 for a prefix.

rkrutz
12-29-2009, 02:07 AM
Ok thank you. So do you know where i could find a xr2240 programmable timer or something similar because all the places I've looked at online don't carry them?

Papabravo
12-29-2009, 02:44 AM
Ok thank you. So do you know where i could find a xr2240 programmable timer or something similar because all the places I've looked at online don't carry them?
That part number is for a part originally made by Exar. The company does not exist anymore and there were seldom any second sources for these parts. eBay is your best bet for the XR2240.

A CD4040 or CD4060 may get you what you want.

rkrutz
12-29-2009, 03:17 AM
Ok thanks for your help. I'll check some local stores and see if they have any. Its just I got a book from the 80's and some of the projects call for it. Does anyone know if there is something similar available in today's market?

VoodooMojo
12-29-2009, 05:35 AM
XR2240 is cross referenced to LM2240 and UA2240
datasheets attached.




if XR2240 is what you want,
XR2240 is available at:

http://www.intertexelectronics.com/product4148.html?osCsid=da05cf2a689ece61d07ca27626 3d98d7

and

http://www.hobid.com/electronic-component/XR2240CP/
A&K Electronics
1598 Virginia Street Tampa Fl. 33626 United States

Papabravo
12-29-2009, 03:08 PM
....
Does anyone know if there is something similar available in today's market?
One more time with feeling. A CD4040 or a CD4060 are similar and available in today's market. Do I have to repeat myself or did the message get through?

BTW I'm amazed that LM (National Semiconductor) and UA (Fairchild) second sourced this part. Given the age of the datasheet from National (1990), I'd be surprised if they corresponded to orderable parts. Digi-Key has none.

Ron H
12-29-2009, 03:47 PM
That part number is for a part originally made by Exar. The company does not exist anymore and there were seldom any second sources for these parts. eBay is your best bet for the XR2240.

A CD4040 or CD4060 may get you what you want.Exar (http://www.exar.com/) would probably be surprised to find that they do not exist.:D
You are right about the fact that they don't make the cool old parts now.:(

SgtWookie
12-29-2009, 04:45 PM
Exar (http://www.exar.com/) would probably be surprised to find that they do not exist.:D
"Reports of my demise have been greatly exaggerated!"
---- Samuel Clemens (aka Mark Twain)

Ron H
12-29-2009, 07:11 PM
"Reports of my demise have been greatly exaggerated!"
---- Samuel Clemens (aka Mark Twain)Why didn't I think of that?:p

VoodooMojo
12-29-2009, 11:51 PM
One more time with feeling. A CD4040 or a CD4060 are similar and available in today's market. Do I have to repeat myself or did the message get through?

BTW I'm amazed that LM (National Semiconductor) and UA (Fairchild) second sourced this part. Given the age of the datasheet from National (1990), I'd be surprised if they corresponded to orderable parts. Digi-Key has none.

I know, thats why I use the 4060.

Papabravo
12-30-2009, 12:32 AM
Exar (http://www.exar.com/) would probably be surprised to find that they do not exist.:D
You are right about the fact that they don't make the cool old parts now.:(
It is the same name, but it sure looks like a different company, with no archival information on its legacy products, and new products with prefixes different than 'XR'. Are you sure that it did not go away for a while until someone resurected the name, Phoenix like, from the ashes.

Guess not. It is now a fabless company after all the aquisitions, and Rohm no longer has any stake in it.

Ron H
12-30-2009, 01:06 AM
Resurrected, like Fairchild Semiconductor? I wondered the same thing, until I read on their web site that they have been around for nearly forty years. (http://www.exar.com/Common/Content/Default.aspx?id=32)
Many(most?) companies drop archival info on their legacy products after production has been stopped for a number of years.

Papabravo
12-30-2009, 01:11 AM
I guess when a company drops off the purchasing radar screen it might as well cease to exist.

dmerrett
03-13-2010, 06:35 PM
If you would like a UA2240 (from texas instruments) I have one. Send me a message and I will post it to you.