DS1312+ Maxim Integrated, DS1312+ Datasheet
DS1312+
Specifications of DS1312+
Related parts for DS1312+
DS1312+ Summary of contents
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Nonvolatile Controller with Lithium Battery Monitor FEATURES Converts CMOS SRAM into nonvolatile memory Unconditionally write-protects SRAM when V is out of tolerance CC Automatically switches to battery backup supply when V power failure occurs CC ...
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In addition to battery-backup support, the DS1312 performs the important function of monitoring the remaining capacity of the lithium battery and providing a warning before the battery reaches end-of-life. Because the open-circuit voltage of a lithium backup battery remains relatively ...
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Should not deactivate for this reason, the new battery can be detached for t BW attached to clear . BW NOTE: The DS1312 cannot constantly monitor an attached battery because such monitoring would drastically reduce the life of the ...
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FUNCTIONAL BLOCK DIAGRAM Figure ...
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ABSOLUTE MAXIMUM RATINGS Voltage Range on Any Pin Relative to Ground Operating Temperature Range Storage Temperature Range Soldering Temperature (reflow TSSOP) Lead Temperature (soldering, 10s) This is a stress rating only and functional operation of the device at ...
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V /V Switch Point CC BAT Output Current @ 2.4V Output Current @ 0.4V Input Leakage Output Leakage Battery Monitoring Test Load DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V PARAMETER Battery Current Battery Backup Current Supply Voltage Output CEO CAPACITANCE ...
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TIMING DIAGRAM: POWER-UP NOTE < will begin to slew with V BAT SW CCO when CCI CCI BAT ...
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TIMING DIAGRAM: POWER-DOWN NOTE < will slew down with V BAT SW CCO until CCI CCI BAT ...
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TIMING DIAGRAM: BATTERY WARNING DETECTION NOTE measured from the expiration of the internal timer to the activation of the battery warning output TIMING DIAGRAM: BATTERY REPLACEMENT ...
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NOTES: 2. All voltages referenced to ground. 3. Measured with outputs open circuited the maximum average load which the DS1312 can supply to attached memories at V CCO1 V -0.2V. CCI the maximum average ...
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... OUTPUT LOAD Figure 2 ORDERING INFORMATION TEMP PART RANGE DS1312+ -40°C to +85°C 8 PDIP DS1312S-2+ -40°C to +85° DS1312S+ -40°C to +85° DS1312E+ -40°C to +85°C 20 TSSOP +Denotes a lead(Pb)-free/RoHS-compliant package. PACKAGE INFORMATION For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “ ...
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... © 2012 Maxim Integrated Products , TOL and output capacitance as being only for CEI Maxim is a registered trademark of Maxim Integrated Products, Inc. ...