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Tube🌱Time

here's a fun chip! giant 64-pin package with the die mounted on the *bottom*
5 April at 20:52 | Open on mastodon.social
14 comments
Lauren Weinstein

@tubetime That's bizarre. I don't think I've ever seen that before.

5 April at 20:52 | Open on mastodon.laurenweinstein.org
Andrew Zonenberg

@tubetime Cavity-down DIP? I've seen one or two of those but not common at all.

Presumably done for thermal reasons?

5 April at 20:54 | Open on ioc.exchange
Tube🌱Time

this is the IDT7212L 12-bit x 12-bit parallel multiplier IC. it can multiply numbers in 30ns and uses a lot less power than the old-style bipolar multiplier chips.

5 April at 21:20 | Open on mastodon.social
Erik van Zijst

@tubetime that's a large die too btw!

5 April at 21:46 | Open on mas.to
Evan
F4GRX Sébastien
AGMS

12 bits suggests this could have been used to more cheaply add multiplication to a PDP-8. Though the data sheet more sensibly says it’s for digital signal processing.

6 April at 2:51 | Open on ruby.social
VulcanTourist
Jonathan Hendry

@tubetime

You need a lift to service one of those. No bueno.

5 April at 21:22 | Open on iosdev.space
Graham Sutherland / Polynomial

@tubetime my immediate visceral reaction was to want to slam my fist on it and make the pins splay out everywhere.

I should not be allowed near big DIP packages.

5 April at 23:23 | Open on chaos.social
Stewart Russell

@tubetime regular ceramic, or the toxic high heat dissipation military-grade stuff?

5 April at 23:28 | Open on xoxo.zone
anyMouse

@tubetime It's so that it's more convenient to sharpen knives on them!

6 April at 19:01 | Open on glitch.social
JeffG

@tubetime almost thought that was a z8000

7 April at 2:32 | Open on mastodon.social
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