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DS1557

Dallas Semiconducotr
Part Number DS1557
Manufacturer Dallas Semiconducotr
Description 4MEG NV Y2KC Timekeeping RAM
Published Sep 21, 2005
Detailed Description 19-5501; Rev 9/10 www.maxim-ic.com DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM FEATURES  Integrated NV S...
Datasheet PDF File DS1557 PDF File

DS1557
DS1557

Overview
19-5501; Rev 9/10 www.
maxim-ic.
com DS1557 4Meg, Nonvolatile, Y2K-Compliant Timekeeping RAM FEATURES  Integrated NV SRAM, Real-Time Clock (RTC), Crystal, Power-Fail Control Circuit, and Lithium Energy Source  Clock Registers are Accessed Identically to the Static RAM; These Registers Reside in the 16 Top RAM Locations  Century Byte Register (i.
e.
, Y2K Compliant)  Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power  Precision Power-On Reset  Programmable Watchdog Timer and RTC Alarm  BCD-Coded Year, Month, Date, Day, Hours, Minutes, and Seconds with Automatic Leap Year Compensation Valid Up to the Year 2100  Battery Voltage-Level Indicator Flag  Power-Fail Write Protection Allows for 10% VCC Power-Supply Tolerance  Lithium Energy Source is Electrically Disconnected to Retain Freshness Until Power is Applied for the First Time  Also Available in Industrial Temperature Range: -40°C to +85°C PIN CONFIGURATION TOP VIEW IRQ/FT 1 34 A18 A15 2 Maxim...


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