DS1218 Maxim Integrated Products, DS1218 Datasheet
DS1218
Specifications of DS1218
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DS1218 Summary of contents
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... Consumes less than 100 na of battery current DESCRIPTION The DS1218 is a CMOS circuit which solves the application problems of converting CMOS RAM into nonvolatile memory. Incoming power is monitored for an out-of-tolerance condition. When such a condition is detected, the chip enable output is inhibited to accomplish write protection and the battery is switched on to supply RAM with uninterrupted power ...
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... IN C OUT ( SYMBOL MIN TYP 0.2 REC t 500 MAX UNITS 5.5 V 5.5 V 0 ± 10%) CCI MAX UNITS 5 mA 100 +1.0 µA mA 4.0 mA BAT (t = 25°C) A MAX UNITS 5.0V ± 10%) CC MAX UNITS µs 1.5 µs DS1218 NOTES NOTES NOTES NOTES ...
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... TIMING DIAGRAM: POWER-UP TIMING DIAGRAM: POWER-DOWN DS1218 ...
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... Outputs open. 4. Drain from battery when V 5. Maximum amount of current which can be drawn through pin 1 of the controller max must be met to ensure data integrity on power loss can only sustain leakage current in the battery backup mode. CEO OUTPUT LOAD Figure 1 < BAT DS1218 ...