Texas Instruments TMS2532 - 1979 Vintage; EPROM - used in #1ESS switch from Western Electric. For those not familiar the #1ESS was used as a local switch in the Bell System later
Eprom Switcher. Come crearlo e scoprire il funzionamento - Nicola Reat
EPROM-Switcher 27C512 Modul inkl. Speicherbaustein wie Moates 2Timer zum Umschalten 27C256