Datasheet Details
| Part number | DS1644 |
|---|---|
| Manufacturer | Maxim Integrated (Analog Devices) |
| File Size | 209.95 KB |
| Description | Nonvolatile Timekeeping RAM |
| Datasheet |
 DS1644 Datasheet
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Description
PIN PDIP PowerCap NAME 1 32 A14 2 30 A12 3 25 A7 4 24 A6 5 23 A5 6 22 A4 7 21 A3 8 20 A2 9 19 A1 10 18 A0 11 16 DQ0 12 15 DQ1 13 14 DQ2 14 17 GND 15 13 DQ3 16 12 DQ4 17 11 DQ5 18 10 DQ6 19 9 DQ7 20 8 CE 21 28 A10 22 7 OE 23 29 A11 24 27 A9 25 26 A8Features
- 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 are Resident in the Eight Top RAM Locations.
- Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power.
- BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Leap Year Compensation Valid Up to 2100.
- Power-Fail Write Protection Allows for ±10% VCC Power Supply Tolera.