Signetics 25120 write-only memory (WOM)

It seems that there isn't much interest in WOM's these days. Maybe it's because their main use now is in internet spam filters, where real e-mails increasingly get sent.

I guess this is the same thing

I particularly like the "number of remaining pins" vs "number of socket insertions" graph. ;)

Yep, it's the same data sheet except that the version I've got also has a closeup of the block diagram. No-one here seemed interested so I removed it from my web space. I don't have unlimited space there. The Remaining Pins graph is my favourite too! :-)

Cheers Bob