DS1643 series datasheets. Manufacturer: Dallas Semiconductor.

DS1643-120 Nonvolatile timekeeping RAM, 120ns access in 28-pin DIP package. Operational temperature range from 0°C to 70°C. Datasheet*) DS1643-150 Nonvolatile timekeeping RAM, 150ns access in 28-pin DIP package. Operational temperature range from 0°C to 70°C. Datasheet*) DS1643 Nonvolatile Timekeeping RAM Datasheet*) DS1643-100 Nonvolatile Timekeeping RAM Datasheet*)

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