Chip operating temperatures

[Mark Pitts]

Thanks for the comment about oven wire, I was wonderin' what to do about =
the temp sender wire that lies accross my cylinder head.. hadnt thought =
of that!

Mark

(who is now happy ;-))


----------
From:  Intec Inoventures Inc.[SMTP:iii at islandnet.com]
Sent:  Thursday, September 26, 1996 3:23 PM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: Chip operating temperatures

>                                       ...The 68332 chips bought in the =

>group pcb buy were rated 0 deg C to 70 deg C (32 deg F to 158 deg F).  =
I'm
sure=20
>these are ok for prototypes, but is anyone concerned about them lasting =
50-100=20
>k miles in a real environment ?

You may want to check the specs on the 68332.  According to my book, the
MC68332FC is rated for -40C to +85C. =20

While a car left in the hot sun can do serious damage to poor Fido =
(rated at
0 to 40C) locked inside, it is unlikely to get up to +85C.  However, =
less
than -40C in North Overshoe, Saskatchewan is not unlikely.  And when you =
go
to start it up in the morning, the interior is probably colder than the
engine compartment.

Incidentally, vinyl coated automotive wire from Wal-Mart or the likes, =
is
rated up to 75C.  It is darned tough getting flexible wire with a higher
temperature rating, short of going to fiberglass insulated oven wire.

Bob Furber


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