There is a RAM, SRAM - Asynchronous memory type associated with this device. The DIP case contains it. Temperatures below -40°C should not be used with this memory ics. It is recommended for operation at temperatures no higher than.
IDT71256SA25TPI Features
Package / Case: DIP
IDT71256SA25TPI Applications
There are a lot of Integrated Device Technology (IDT) IDT71256SA25TPI Memory applications.