30 Sep
2020
30 Sep
'20
1:08 p.m.
The Motorola SC prefix means a custom or semicustom part. Good luck!
--
Will
On Wed, Sep 30, 2020 at 4:05 PM Josh Dersch via cctalk
<cctalk at classiccmp.org> wrote:
I'm in the middle of working out the pinout for the power supply connector
on the MDP-1000. I'm aided somewhat by a set of test points on the
backplane, unfortunately the "+" and "-" symbols (in the solder mask
labels
next to the test points) are nearly indiscernible, so I'm trying to verify
that I'm not mixing up + and - 15V.
On the core memory boards are eight Motorola SC5330 IC's (datecodes from
early 1969), which have pins connected to both the + and - 15V lines -- if
I can find a datasheet I could pretty easily confirm which is which.
Trouble is I can't find anything on this chip. I've scanned through the
databooks on Bitsavers, no luck. Anyone have any ideas?
Here's a picture in case that helps at all:
https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg
- Josh