1701 1702 eprom

[Neon_WA]

Just wanted to start a thread to get feedback on info I find about 1701 & 1702 eproms.
This also applies to 1601 & 1602s.. but it is too long to say 1601/1701 & 1602/1702

I'm pretty good at find info, but often I may not fully understand it and that is why I want the feedback.

Ok.. what we know
1701 can run in Static or Dynamic mode
1702 can only run in Static mode

Intel lists seemly in Sept 1972 catalog this statement

The Dynamic mode of the 1601/1701 and 1301 refers to the decoding circuitry and not the memory cell.
Dynamic operation offers higher speed and lower power dissipation than static operation.

below is the characteristics for both Static & Dynamic

[Neon_WA]

the control of Static or Dynamic operation is driven by VGG (Gate Voltage)

pin 16 on the following pin-out diagram

[Neon_WA]

It is amazing what happens when you put pen to paper

I had and a few others took Intel's statement to meaning there was a physical difference in the decoding circuitry

just realised it probably should say this to be clear in it's meaning

The Dynamic mode of the 1601/1701 and 1301 refers to operation of the decoding circuitry and
does not affect the operation of the memory cell.
Dynamic operation offers higher speed and lower power dissipation than static operation.

EDIT>> had a reply from Dov Frohman regarding the 1701/1702 dies

If I remember correctly, the only difference between the 1601 and 1701 is that the first had a sealed lid (to be erased by X-Rays)
and the second had a quartz window (to be erased by UV) with no difference between the die.

Actually within a short period of time and certainly by the end of 1972 only the UV erasable static mode (1702) was sold.
The 1701 and 1702 die are identical, the only difference you may see in high resolution is in the metal interconnection pattern in the decoder area.

Dov

[Neon_WA]

slightly off the issue but worth while historical information

Dov left Intel before the 1701 & 1702 was released,
but as far as he can remember Greg Pasco & Gene Greenwood carried out the final work
to get the 1701/1702 onto the production line

[Neon_WA]

I purchased a eprom programmer for 1702As in kit form from someone in the US.

We got to talking and I explained I was working on replica programming boards for 1701s & 1702s. While mine are manual programming boards, Martin's can be connected to fairly modern computers to automate the programming

I ended up supplying him data I had & some non A version eproms for testing his programming to include non A eproms
After Martin nutted out a small hardware change.. success

What was interesting is that all non A eproms I supplied had a few bits stuck high and only after many programming passes managed to free these bits.
So 1701/1702s if not reprogrammed soon will probably in another 10 or 20 years will not be able to be reprogrammed at all

bit like the saying if you don't use it, you will lose it