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DS1744P-70 Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS1744P-70 Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 16 page  1 of 16 FEATURES 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. Century Byte Register (i.e., Y2K Compliant) Totally Nonvolatile with Over 10 Years of Operation in the Absence of Power BCD-Coded Century, 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 DIP Module Only Standard JEDEC Byte-Wide 32k x 8 Static RAM Pinout PowerCap Module Board Only Surface-Mountable Package for Direct Connection to PowerCap Containing Battery and Crystal Replaceable Battery (PowerCap) Power-On Reset Output Pin-for-Pin Compatible with Other Densities of DS174xP Timekeeping RAM Also Available in Industrial Temperature Range: -40°C to +85°C UL Recognized PIN CONFIGURATIONS 1 N.C. 2 3 N.C. N.C. RST VCC WE OE CE DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 GND 4 5 6 7 8 9 10 11 12 13 14 15 16 17 N.C. A14 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 34 N.C. X1 GND VBAT X2 PowerCap MODULE BOARD (Uses DS9034PCX+ or DS9034I-PCX+ PowerCap) DS1744P TOP VIEW VCC WE A13 A8 A9 A11 OE A10 CE DQ7 DQ6 DQ5 DQ4 DQ3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A14 A12 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 DQ1 DQ2 GND 28 27 26 25 24 23 22 21 20 19 18 17 16 15 DS1744 EDIP 19-5502; Rev 3/12 DS1744/DS1744P Y2K-Compliant, Nonvolatile Timekeeping RAMs |
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