DS1642

非易失时钟RAM

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产品详情

Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit, and Lithium Energy Source
Standard JEDEC Bytewide 2k x 8 Static RAM Pinout
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
Access Times of 85ns and 100ns
Quartz Accuracy ±1 Minute a Month at +25°C, Factory Calibrated
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% V_CC Power Supply Tolerance
Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time

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