DS1312S+T&R Maxim Integrated Products, DS1312S+T&R Datasheet
DS1312S+T&R
Specifications of DS1312S+T&R
Related parts for DS1312S+T&R
DS1312S+T&R Summary of contents
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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 § Monitors voltage of a lithium cell ...
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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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NOTE: The DS1312 cannot constantly monitor an attached battery because such monitoring would drastically reduce the life of the battery result, the DS1312 only tests the battery for one second out of every 24 hours and does not ...
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FUNCTIONAL BLOCK DIAGRAM Figure ...
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ABSOLUTE MAXIMUM RATINGS* Voltage on Any Pin Relative to Ground Operating Temperature Storage Temperature Soldering Temperature * This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the ...
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CAPACITANCE PARAMETER Input Capacitance ( , TOL) CEI Output Capacitance ( , , ) CEO BW RST AC ELECTRICAL CHARACTERISTICS PARAMETER to Propagation Delay CEI CEO Pulse Width CE V Valid to End of CC Write Protection V Valid to ...
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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: 1. All voltages referenced to ground. 2. 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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DATA SHEET REVISION SUMMARY The following represent the key differences between 12/16/96 and 06/12/97 version of the DS1312 data sheet. Please review this summary carefully. 1. Changed V max to 6V BAT 2. Changed t from max ...