(China (Mainland))
Product Summary
The DS1742W-120 is a full-function, year 2000-compliant (Y2KC), real-time clock/calendar (RTC) and 2k x 8 nonvolatile static RAM. The DS1742W-120 contains its own power-fail circuitry, which deselects the device when the VCC supply is in an out-of-tolerance condition. This feature of the DS1742W-120 prevents loss of data from unpredictable system operation brought on by low VCC as errant access and update cycles are avoided.
Parametrics
DS1742W-120 absolute maximum ratings: (1)Voltage Range on Any Pin Relative to Ground: -0.3V to +6.0V; (2)Storage Temperature Range: -40℃ to +85℃; (3)Soldering Temperature (EDIP, leads): +260℃ for 10 seconds.
Features
DS1742W-120 features: (1)Integrated NV SRAM, Real-Time Clock, Crystal, Power-Fail Control Circuit and Lithium Energy Source; (2)Clock Registers are Accessed Identically to the Static RAM; These Registers are Resident in the Eight Top RAM Locations; (3)Century Byte Register; (4)Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power; (5)BCD Coded Century, Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year Compensation Valid Up to the year 2100; (6)Battery Voltage Level Indicator Flag; (7)Power-Fail Write Protection Allows for ±10% VCC Power Supply Tolerance; (8)Lithium Energy Source is Electrically Disconnected to Retain Freshness until Power is Applied for the First Time; (9)Standard JEDEC Bytewide 2k x 8 Static RAM Pinout; (10)Quartz Accuracy ±1 Minute a Month at +25℃, Factory Calibrated; (11)Underwriters Laboratories Recognized.
Diagrams
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 DS1742W-120 |
Maxim Integrated Products |
Real Time Clock Timekeeping NV RAM |
Data Sheet |
Negotiable |
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DS1742W-120+ |
Maxim Integrated Products |
Real Time Clock Timekeeping NV RAM |
Data Sheet |
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