SMC 2010, 2009 & 3007 dip chips???

From: Eric Smith <eric_at_brouhaha.com>
Date: Mon Oct 30 19:43:19 2000

Someone (Paxton, I think?) wrote:
> I have a SMC 2010B with a date code of 7736 in Ceramic with gold legs.
> Is this a second source of the Western Digital or something different?

I wrote:
> Although SMC did second source many Western Digital chips, this one is
> about seven years too early to be the 2010 HDC.

Allison wrote:
> No that would be about right for that chip... 1987. My 1985 SMC catalong
> lists
> the 2010 as "preliminary".

No, that's *wrong* for that chip. Paxton's 7736 date code means 1977,
not 1987.

5.25 inch Winchester disk drives were not introduced until 1981 or so, and
the WD1010 "single-chip" controller (which it wasn't really) was several
years later, and the WD2010 was later yet.

WD started their Winchester disk support with the WD110 series MSI parts,
which together with the Signetics 8X300 processor formed the basis of
the WD1000 board-level controller. The general architecture of the
WD1000 lives on to this day (unfortunately) as the basis for the IDE (ATA)
disk interface.

As regards the WD2010, I don't have my SMC data books handy, but I expect
SMC must have done one of:

1) not second-sourced the 2010
2) second-sourced it with a different number
3) reused the part number (disgusting, but it's been known to happen)

I wouldn't be surprised if they didn't second-source it, since they
second-sourced the NEC 7261 (and several variants), and designed
several of their own.

Eric
Received on Mon Oct 30 2000 - 19:43:19 GMT