Re: Anyone have any info on the NEC D2167D-2?

[Ethan Dicks via cctalk]

On Tue, Feb 27, 2018 at 8:44 PM, Ethan Dicks  wrote:
> Hi, all,
>
> I'm going through a box of random ICs...
>
> The IC is a 20-pin ceramic body with side brazed legs, gold pins, chromed
> lid, with NEC D2168D on it with "-2" painted on the ceramic and date codes
> from 1984.  It's almost certainly a RAM chip of some kind, but I'm not
> finding any pinouts or data sheets.

I found more parts of a similar nature which helped untangle this...
It appears to be the same configuration as the Mitsubishi M5M2167S,
which was easier to find.  A document somewhere pointed me to the full
part number of my initial search of uPD2167D (the "uP" on the front
made all the difference).

16Kx1 55ns SRAM (-2 variant), 20 pins, crossed with Fujitsu and Intel
2167 parts, and the Inmos IMS1400.

Still don't know what vintage machines this might have appeared in.
Anyone know?

-ethan

Re: Anyone have any info on the NEC D2167D-2?

[Glen Slick via cctalk]

On Tue, Feb 27, 2018 at 5:44 PM, Ethan Dicks via cctalk
 wrote:
> Hi, all,
>
> I'm going through a box of random ICs and one particular item is not
> showing up on my searches outside of a couple eBay auctions for chip
> collectors.
>
> The IC is a 20-pin ceramic body with side brazed legs, gold pins, chromed
> lid, with NEC D2168D on it with "-2" painted on the ceramic and date codes
> from 1984.  It's almost certainly a RAM chip of some kind, but I'm not
> finding any pinouts or data sheets.
>
> Anyone recognize this?  Anyone know a system that uses them?  I have more
> than 10, and since I haven't run across them before, I probably don't have
> a machine that needs them.
>
> Thanks for any tips.
>
> -ethan

Msg title says D2167D, msg body says D2168D. Assuming D2167D is
correct, an NEC uPD2167 is a 16Kx1 SRAM in a 20-pin DIP package.
Separate data in and data out pins, 14 address pins,  /CS and /WE
pins.  The  uPD2167-2 has a 70ns access time, the  uPD2167-3 has a
55ns access time.

A search for uPD2167 should turn up datasheets.

Anyone have any info on the NEC D2167D-2?

[Ethan Dicks via cctalk]

Hi, all,

I'm going through a box of random ICs and one particular item is not
showing up on my searches outside of a couple eBay auctions for chip
collectors.

The IC is a 20-pin ceramic body with side brazed legs, gold pins, chromed
lid, with NEC D2168D on it with "-2" painted on the ceramic and date codes
from 1984.  It's almost certainly a RAM chip of some kind, but I'm not
finding any pinouts or data sheets.

Anyone recognize this?  Anyone know a system that uses them?  I have more
than 10, and since I haven't run across them before, I probably don't have
a machine that needs them.

Thanks for any tips.

-ethan