View max8215-max8216 datasheet:

19-0169; Rev 0; 8/93 ±5V, ±12V (±15V) Dedicated Microprocessor Voltage Monitors _______________General Description ____________________________Features The MAX8215 contains five voltage comparators; four 4 Dedicated Comparators plus 1 Auxiliary Comparator are for monitoring +5V, -5V, +12V, and -12V, and the fifth monitors any desired voltage. The MAX8216 is 5V Dedicated Comparator Has ±1.25% Accuracy identical, except it monitors ±15V supplies instead of -5V, +12V, -12V, +15V, -15V Dedicated ±12V. The resistors required to monitor these voltages Comparators Have ±1.5% Accuracy and provide comparator hysteresis are included on- Overvoltage/Undervoltage Detection or chip. All comparators have open-drain outputs. These Programmable Delay Using Auxiliary Comparator devices