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MAX694C/D Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX694C/D Datasheet(HTML) 3 Page - Maxim Integrated Products |
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3 / 18 page  VCC = full operating range, VBATT = 2.8V, TA = +25°C, unless otherwise noted.) PARAMETER CONDITIONS MIN TYP MAX UNITS Battery Switchover Hysteresis 20 mV BATT ON Output Voltage ISINK = 3.2mA 0.4 V BATT ON Output Short-Circuit Current BATT ON = VOUT = 4.5V sink current 25 mA BATT ON = 0V source current 0.5 1 25 µA RESET AND WATCHDOG TIMER Reset Voltage Threshold TA = full operating range MAX690, MAX691, MAX694, MAX695 4.5 4.65 4.75 V MAX692, MAX693 4.25 4.4 4.5 Reset Threshold Hysteresis 40 mV Reset Timeout Delay (MAX690/MAX691/ MAX692/MAX693) Figure 6, OSC SEL HIGH, VCC = 5V 35 50 70 ms Reset Timeout Delay (MAX694/MAX695) Figure 6, OSC SEL HIGH, VCC = 5V 140 200 280 ms Watchdog Timeout Period, Internal Oscillator Long period, VCC = 5V 1.0 1.6 2.25 s Short period, VCC = 5V 70 100 140 ms Watchdog Timeout Period, External Clock Long period 3840 4097 Clock Cycles Short period 768 1025 Minimum WDI Input Pulse Width VIL = 0.4, VIH = 0.8VCC 200 ns RESET and LOW LINE Output Voltage ISINK = 1.6mA, VCC = 4.25V 0.4 V ISOURCE = 1µA, VCC = 5V 3.5 RESET and WDO Output Voltage ISINK = 1.6mA 0.4 V ISOURCE = 1µA, VCC = 5V 3.5 Output Short-Circuit Current RESET, RESET, WDO, LOW LINE 1 3 25 µA WDI Input Threshold Logic-Low VCC = 5V (Note 2) 0.8 V WDI Input Threshold Logic-High VCC = 5V (Note 2) 3.5 WDI Input Current WDI = VOUT 20 50 µA WDI = 0V -50 -15 POWER-FAIL DETECTOR PFI Threshold VCC = 5V, TA = full 1.2 1.3 1.4 V PFI Current ±0.01 ±25 nA PFO Output Voltage ISINK = 3.2mA 0.4 V ISOURCE = 1µA 3.5 V PFO Short Circuit Source Current PFI = VIH, PFO = 0V 1 3 25 µA MAX690–MAX695 Microprocessor Supervisory Circuits www.maximintegrated.com Maxim Integrated │ 3 Electrical Characteristics (continued) |
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