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DS1646 - Nonvolatile Timekeeping RAM

General Description

N.C.

Key Features

  • Integrates 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 Toleran.

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Full PDF Text Transcription for DS1646 (Reference)

Note: Below is a high-fidelity text extraction (approx. 800 characters) for DS1646. For precise diagrams, and layout, please refer to the original PDF.

19-5595; Rev 10/10 DS1646/DS1646P Nonvolatile Timekeeping RAM www.maxim-ic.com FEATURES  Integrates NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lit...

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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 Tolerance  DS1646 only (DIP Module) PIN CONFIGURATIONS N.C. A16 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 VCC 31 A15 30

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