Chip operating temperatures

[dzorde at aesprodata.com.au]

     Just my few cents worth.  Any of you lot out there ever heard about 
     spaghetti strand (a common name).  Comes in long tubes like 
     heatshrink, except its woven fibreglass and it doesn't shrink.  This 
     is ideal for containing bunches of wire (or a single wire) in hot 
     places (like engine bays).  There is a very noticable temp difference 
     between the inside and outside of the tube when this is used.  Use it 
     with standard automotive wire, you can basically run those wires 
     across the extractors if you want to, and the wires will still 
     survive.  Just a thought, its a lot cheaper than buying oven wire, at 
     least down under.
     
     Dan        dzorde at aesprodata.com.au


______________________________ Reply Separator _________________________________
Subject: RE: Chip operating temperatures
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    9/27/96 1:13 AM


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
     
     
--------------------------------------------------------------------
    MC68HC16 Embedded Controllers and Software Development Tools    |
              WebPg   http://www.islandnet.com/~iii                 |
-------------------------------------------------------------------- 
Intec Inoventures Inc.       Phone   604-721-5150                   | 
2751 Arbutus Road            Fax         721-4191                   | 
Victoria   BC  V8N 5X7                                              | 
Canada                                                              | 
--------------------------------------------------------------------