57022
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57100589-57022
Timekeeper SRAM 256K (32Kx8) Parallel DIP28
The operating temperature is the range of ambient temperature within which a power supply, or any other electrical equipment, operate in. This ranges from a minimum operating temperature, to a peak or maximum operating temperature, outside which, the power supply may fail.
The memory capacity is the amount of data a device can store at any given time in its memory.