[sebhc] IC information

Lee Hart leeahart at earthlink.net
Mon Feb 28 02:36:02 CST 2005


Dan Lanciani wrote:
> |The 7905 should be mounted on a heatsink

Not in this case. The regulator only powers the -5v of an 8080 and a
triple-supply ROM. Current drain is very low, so no heatsink is needed.
And there WAS no heatsink on the H8 board.

> |Verify that the exposed metal back is ground, if it's not,
> |you will need an insulator.
> 
> Do there actually exist any 7905s where the metal case or tab
> is ground?

Not that I know of. On pretty much all the negative voltage regulators,
the heatsink tab is NOT ground!
-- 
If you would not be forgotten
When your body's dead and rotten
Then write of great deeds worth the reading
Or do the great deeds worth repeating
	-- Ben Franklin, Poor Richard's Almanac
--
Lee A. Hart  814 8th Ave N  Sartell MN 56377  leeahart_at_earthlink.net

--
Delivered by the SEBHC Mailing List



More information about the Sebhc mailing list