Manufacturer: DALLAS
Type: Integrated Chip
Model: DS1220Y
Part No.: 8905D1

Features:
-10 years minimum data retention in the absence of external power
-Data is automatically protected during power loss
-Directly replaces 2k x 8 volatile static RAM or EEPROM
-Unlimited write cycles
-Low-power CMOS
-JEDEC standard 24-pin DIP package
-Read and write access times of 100ns
-Full ±10% operating range
-Optional industrial temperature range of -40°C to +85°C, designated IND
Operating voltage range: 5 V (4.5 … 5.5 V)
Operating Temperature: 0 … 70°C