Old IC Datasheet

snipped-for-privacy@gmail.com schrieb:

According to this is a 64x8 Bit bipolar PROM in a DIP24 package.

From the density, this must have been in the 70s... I don't have such old memory data books at hand; even my old Fairchild bipolar memory data book of 1980 starts with 1Kx8...

It's also unlikely you'll get anything online. However, maybe you can get some information about a pin compatible device of another maker, if you just need the pinout details and some basic specs for error tracking.

Tilmann

I tried looking for a pin compatible device but unfortunately the closest I came to it was the 74S475 which is not exactly pin compatible. I just need the pinout of the IC to be able to map it to another newer more available one.

g=2E

I got the pinout for the chip from an old version of DATA PAL but some of the labels don't make much sense. There's a pin that says "H" and it's in the place of the GND so I guess it's a ground. But there are two pins that say G2, does anyone have any idea what that means?

snipped-for-privacy@gmail.com schrieb:

Look at the circuit the device was in: is that pin connected to ground?

The label G is often used for global enable lines.

Maybe that device has several (maybe different) enable (or chip select) inputs? (like the 74138, for example - one active low, two active high.) You should check where these pins are connected to. Maybe they are simply tied to constant voltages (VCC or GND).

Tilmann

snipped-for-privacy@gmail.com schrieb:

Please look at

Martin

Martin Siegwarth schrieb:

Wow - that's good service.

Now it's also clear that G1 and G2 are ground pins, which are also used for programming the fuse matrix (at least G2, from the maximum voltages specs).

Tilmann

- YD.