Datasheet Details
| Part number | DS1643 |
|---|---|
| Manufacturer | Maxim Integrated (now Analog Devices) |
| File Size | 254.49 KB |
| Description | Nonvolatile Timekeeping RAMs |
| Datasheet |
 DS1643 Datasheet
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General Description
PDIP 1 2 3 4 5 6 7 8 9 10 21 23 24 25 11 12 13 15 16 17 18 19 20 22 26 27 28
14
PIN PowerCap 1, 2, 3, 31
34 30 25 24 23 22 21 20 19 18 28 29 27 26 16 15 14 13 12 11 10 9 8 7
6 5 4 17 NAME N.C.
Key Features
- Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source.
- Clock Registers are Accessed Identically to the Static RAM. These Registers Reside in the Eight Top RAM Locations.
- Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power.
- Access Times of 85ns and 100ns.
- BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year Compensation Valid Up to 2100.
- Power-Fail Write Protection Allows f.