MK48T12B-25 Datasheet and MK48T12B-25 manual

Manufacturer : ST Microelectronics 

Packing : PHDIP 

Pins : 24 

Temperature : Min 0 °C | Max 70 °C

Size : 1014 KB

Application : "CMOS 2K x 8 timekeeper SRAM, 250ns" 

MK48T12B-25 PDF Download