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DS1747WP-120 Datasheet(PDF) 1 Page - Dallas Semiconductor |
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DS1747WP-120 Datasheet(HTML) 1 Page - Dallas Semiconductor |
1 / 18 page 1 of 18 REV: 011204 Note: Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of any device may be simultaneously available through various sales channels. For information about device errata, click here: www.maxim-ic.com/errata. 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 are Resident in the Eight Top RAM Locations. § Century Byte Register (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 512k x 8 Static RAM Pinout § PowerCapÒ 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 PIN CONFIGURATIONS DS1747/DS1747P Y2K-Compliant, Nonvolatile Timekeeping RAMs www.maxim-ic.com PowerCap is a registered trademark of Dallas Semiconductor. A17 A18 13 1 2 3 4 5 6 7 8 9 10 11 12 14 31 Encapsulated DIP (512k x 8) A14 A7 A5 A4 A3 A2 A1 A0 DQ1 DQ0 VCC A15 WE A13 A8 A9 A11 OE A10 CE DQ7 DQ5 DQ6 32 30 29 28 27 26 25 24 23 22 21 19 20 A16 A12 A6 DQ2 GND 15 16 18 17 DQ4 DQ3 Dallas Semiconductor DS1747 1 N.C. 2 3 A15 A16 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 A17 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 A18 X1 GND VBAT X2 PowerCap Module Board (Uses DS9034PCX PowerCap) Dallas Semiconductor DS1747P TOP VIEW |
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