DS1210 Maxim, DS1210 Datasheet
DS1210
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DS1210 Summary of contents
Page 1
... DESCRIPTION The DS1210 Nonvolatile Controller Chip is a CMOS circuit which solves the application problem of converting CMOS RAM into nonvolatile memory. Incoming power is monitored for an out-of-tolerance condition. When such a condition is detected, chip enable is inhibited to accomplish write protection and the battery is switched on to supply the RAM with uninterrupted power ...
Page 2
... Figure 1 shows a typical application incorporating the DS1210 in a microprocessor-based system. Section A shows the connections necessary to write protect the RAM when V up the supply with batteries. Section B shows the use of the DS1210 to halt the processor when V less than 4.75 volts and to delay its restart on power-up to prevent spurious writes. ...
Page 3
... SECTION A - BATTERY BACKUP Figure 1 BATTERY BACKUP CURRENT DRAIN EXAMPLE CONSUMPTION DS1210 I 100 nA BAT 10 mA RAM I CC02 10.1 mA Total Drain SECTION B - PROCESSOR RESET ...
Page 4
... 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 operation sections of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability. RECOMMENDED DC OPERATING CONDITIONS PARAMETER ...
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... DS1210 can supply to the memories. CC01 5. Measured with a load as shown in Figure the maximum average load current which the DS1210 can supply to the memories in the CC02 battery backup mode max. must be met to ensure data integrity on power loss. ...
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TIMING DIAGRAM: POWER-UP TIMING DIAGRAM: POWER-DOWN OUTPUT LOAD Figure ...