[sdiy] 7905 regulator "metal package"?

[Tim Parkhurst]

On Thu, May 6, 2010 at 2:23 PM, cs e <modulemania at gmail.com> wrote:
> I've got a mc7905ck "-5V" reference IC here, its the wide "metal
> package" version.  I cannot find a datasheet for this package type!
>
> I assume that the "metal case" itself is Ground, but I don't know
> which pin is input and which is output.  I am afraid to "test it" and
> destroy the device - because it is the only one I have right now and I
> need to use it soon (can't wait to order another one).
>
> Any help?  If I wire it up backwards will I destroy it?
>

Google is your friend:
http://www.fairchildsemi.com/ds/LM/LM7905.pdf

I'm hoping that the 'metal package' you're describing is the metal
heat sink tab on a TO-220 package

And yes, if you wire it up backwards, you stand a good chance of destroying it.


Tim (been wired backwards for years) Servo
-- 
"Sire, the church of God is an anvil that has worn out many hammers."
- H.L. Hastings