Email or username:

Password:

Forgot your password?
bitsavers.org's posts Post Back to profile
bitsavers.org

Here is an IC mystery
When did TI make plastic TTL with the logo
embossed into the divot?
It seems VERY unlikely they were making epoxy bodied ICs in 1965

A picture of two TI plastic TTL SN7475N ICs with an 0565 date code. The pin 1 divot has a TI logo embossed into it.
21 September at 16:39 | Open on oldbytes.space
3 comments
Philip Bragg

@bitsavers They look too narrow, too. I'm getting strong "soviet bloc" package vibes from these. CEMI and TESLA had those long divots. I reckon these are re-marked parts. '65 seems too early.

21 September at 16:56 | Open on bsd.network
Philip Bragg

@bitsavers Digging around, it seems TI did have the long divot style about 10 years later and even >20 years later (slightly shallower by 1988), but no sign of the logo inside it.

21 September at 16:59 | Open on bsd.network
Bread80

@bitsavers I have no relevant knowledge knowledge but I wonder if this could be from a time when prices where high and there was enough margin to pay the higher manufacturing cost. The 3D logo would flaunt the technical advances and make them harder to clone.

21 September at 17:01 | Open on mstdn.social
Go Up