Re: Datasheet / Info for Motorola SC5330 IC?
On Wed, Sep 30, 2020 at 7:48 PM Bob Rosenbloom via cctalk < cctalk@classiccmp.org> wrote: > On 9/30/2020 3:40 PM, Josh Dersch via cctalk wrote: > > On Wed, Sep 30, 2020 at 2:41 PM Gavin Scott via cctalk < > > cctalk@classiccmp.org> wrote: > > > >> Josh wrote: > >>> https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg > >> Would these potentially be the sense amp / comparators for the core? I > >> wonder if they were anything like: > >> > >> https://datasheetspdf.com/pdf-file/1092342/Motorola/MC1711L/1 > >> > >> which might have a similar application and take +15 and -7 on L > >> package pins 11 and 4 respectively with ground on pin 12. > >> > >> Being another Motorola design from what looks like a similar time > >> period, I wonder if there could be a similarity in pinouts by some > >> chance? > >> > > It's not an MC1711L based on that pinout. (But I suspect as you do that > > it's part of the sense amp for the core). In particular Pin 1 of the IC > is > > connected to what I believe to be +15V. (It's also hard to tell what > pin 1 > > is, since there's no orientation marker on these... ) Ground is pin > 10. I > > suspect -15V is pin 7. > > > > - Josh > That pinout sounds like the Motorola MC1440 sense amp though the > voltages are different. > Thanks, Bob! That does seem to be the same pinout, at least for the power/ground. I think I've managed to convince myself of the correct pinout for the power connector on this thing. I have a suitable supply and connector on their way... - Josh > Bob > > -- > Vintage computers and electronics > www.dvq.com > www.tekmuseum.com > www.decmuseum.org > >
Re: Datasheet / Info for Motorola SC5330 IC?
On 9/30/2020 3:40 PM, Josh Dersch via cctalk wrote: On Wed, Sep 30, 2020 at 2:41 PM Gavin Scott via cctalk < cctalk@classiccmp.org> wrote: Josh wrote: https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg Would these potentially be the sense amp / comparators for the core? I wonder if they were anything like: https://datasheetspdf.com/pdf-file/1092342/Motorola/MC1711L/1 which might have a similar application and take +15 and -7 on L package pins 11 and 4 respectively with ground on pin 12. Being another Motorola design from what looks like a similar time period, I wonder if there could be a similarity in pinouts by some chance? It's not an MC1711L based on that pinout. (But I suspect as you do that it's part of the sense amp for the core). In particular Pin 1 of the IC is connected to what I believe to be +15V. (It's also hard to tell what pin 1 is, since there's no orientation marker on these... ) Ground is pin 10. I suspect -15V is pin 7. - Josh That pinout sounds like the Motorola MC1440 sense amp though the voltages are different. Bob -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org
Re: Datasheet / Info for Motorola SC5330 IC?
On Wed, Sep 30, 2020 at 2:41 PM Gavin Scott via cctalk < cctalk@classiccmp.org> wrote: > Josh wrote: > > https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg > > Would these potentially be the sense amp / comparators for the core? I > wonder if they were anything like: > > https://datasheetspdf.com/pdf-file/1092342/Motorola/MC1711L/1 > > which might have a similar application and take +15 and -7 on L > package pins 11 and 4 respectively with ground on pin 12. > > Being another Motorola design from what looks like a similar time > period, I wonder if there could be a similarity in pinouts by some > chance? > It's not an MC1711L based on that pinout. (But I suspect as you do that it's part of the sense amp for the core). In particular Pin 1 of the IC is connected to what I believe to be +15V. (It's also hard to tell what pin 1 is, since there's no orientation marker on these... ) Ground is pin 10. I suspect -15V is pin 7. - Josh
Re: Datasheet / Info for Motorola SC5330 IC?
Josh wrote: > https://1drv.ms/u/s!Aqb36sqnCIfMpIVXm5draSrWHGMzJg Would these potentially be the sense amp / comparators for the core? I wonder if they were anything like: https://datasheetspdf.com/pdf-file/1092342/Motorola/MC1711L/1 which might have a similar application and take +15 and -7 on L package pins 11 and 4 respectively with ground on pin 12. Being another Motorola design from what looks like a similar time period, I wonder if there could be a similarity in pinouts by some chance?
Re: Datasheet / Info for Motorola SC5330 IC?
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 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
Datasheet / Info for Motorola SC5330 IC?
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
