[sci.electronics] LM741 op amp and XR2240 timer

gerosa@bucsb.UUCP (Bill Gerosa) (02/03/89)

Does anyone know if there is a major difference between the LM741 op amp and
the 741CV op amp? Are they interchangeable?
Also, can anyone help me find a distributer for the XR2240 timer made
by Exar? I know who it is made by, I just don't know where Exar is
located.
Thanks for your replies.

tindle@ms.uky.edu (Ken Tindle) (02/05/89)

In article <2343@bucsb.UUCP> gerosa@bucsb.UUCP (Bill Gerosa) writes:
>Does anyone know if there is a major difference between the LM741 op amp and
>the 741CV op amp? Are they interchangeable?

I believe the 'C' suffix means the device is frequency compensated internally.
I have never seen a non-C suffix device in use, it's plenty cheap enough to
get that version.  The application would determine suitability.  

>Also, can anyone help me find a distributer for the XR2240 timer made
>by Exar? I know who it is made by, I just don't know where Exar is
>located.

I used this chip in a light timer once.  It's available from:
    Circuit Specialists Inc.
    P.O. Box 3047
    Scottsdale AZ 85271-3047
    Order number is 1-800-528-1417

They have no minimum order when payment accompanies an order.  The catalog
number is (logically enough) XR2240C.  It's $2.25 each.  There's a $2.00
shipping charge.

I have no connection with them except as a satisfied customer.  They've
always treated me well.  
  
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ISW@cup.portal.com (Isaac S Wingfield) (02/07/89)

The "CV" in "741CV" is probably one manufacturer's designation
for package type (plastic, ceramic, metal can); it is not related
to compensation, as all 741's are unity-gain compensated. If memory
serves, the 747 is an uncompensated 741.

Isaac       isw@cup.portal.com

wolpert@caip.rutgers.edu (Seth Wolpert) (02/09/89)

In article <14370@cup.portal.com>, ISW@cup.portal.com (Isaac S Wingfield) writes:
> If memory serves, the 747 is an uncompensated 741.
> 
I always thought the 747 was a pair of 741's in a 14-pin package.

**************************************************************************
** My mind's already made up, so don't ****  Seth Wolpert  R.U. EE, CS  **
**  try and confuse me with the facts. ****  Career Student, that is.   **
**************************************************************************

jeffw@midas.STS.TEK.COM (Jeff Winslow) (02/11/89)

In article <11025@s.ms.uky.edu> tindle@ms.uky.edu (Ken Tindle) writes:
>In article <2343@bucsb.UUCP> gerosa@bucsb.UUCP (Bill Gerosa) writes:
>>Does anyone know if there is a major difference between the LM741 op amp and
>>the 741CV op amp? Are they interchangeable?

They're interchangeable if their package styles are the same.

>I believe the 'C' suffix means the device is frequency compensated internally.
>I have never seen a non-C suffix device in use, it's plenty cheap enough to
>get that version.  The application would determine suitability.  

Nope - all 741's are (at least meant to be) internally compensated. The C
refers to the 0-70 deg C temperature range.

						Jeff Winslow