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MAX818MCSA Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX818MCSA Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 16 page ELECTRICAL CHARACTERISTICS (continued) (VCC = +4.75V to +5.5V for MAX81_L, VCC = +4.5V to +5.5V for MAX81_M, VBATT = 2.8V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) +5V Microprocessor Supervisory Circuits _______________________________________________________________________________________ 3 V PFO = 0V VPFI > 1.30V, ISOURCE = 40µA, VCC > 4.5V MAX81_M VPFI < 1.20V, ISINK = 3.2mA, VCC > 4.50V MAX81_L WDI = GND, time average From VRST, VCC falling at 10V/ms WDI = VCC, time average VCC = 5V MAX81_ _C, VCC = 1V, VCC falling, VBATT = 0V, ISINK = 50µA VCC > VRST(MAX), ISOURCE = 800µA VCC < VRST(MIN), ISINK = 3.2mA VIL = 0.4V, VIH = 0.8VCC CONDITIONS µA 250 500 PFO Short-Circuit Current VCC - 1.5 VOH PFO Output Voltage V 0.4 VOL nA -25 0.01 25 IPFI PFI Input Current mV 4 PFI Input Hysteresis V 1.20 1.25 1.30 VPFT PFI Input Threshold µA -20 -15 WDI Input Current (Note 5) 120 160 V 3.5 VIH WDI Input Threshold (Note 4) 0.8 VIL ns 50 tWDI WDI Pulse Width V 4.25 4.40 4.50 VRST Reset Threshold 4.50 4.65 4.75 sec 1.00 1.60 2.25 tWD Watchdog Timeout Period µs 100 VCC to RESET Delay 0.3 mV 25 Reset Threshold Hysteresis ms 140 200 280 tRP Reset Timeout Period VCC - 1.5 VOH 0.4 VOL UNITS MIN TYP MAX SYMBOL PARAMETER MAX81_ _E, VCC = 1.2V, VCC falling, VBATT = 0V, ISINK = 100µA V 0.3 RESET Output Voltage 0.8 V 2.0 VIL MR Input Threshold µs 1 MR Pulse Width VIH ns 100 MR Pulse that Would Not Cause a Reset ns 120 MR to Reset Delay k Ω 45 63 85 MR Pull-Up Resistance RESET AND WATCHDOG TIMER POWER-FAIL COMPARATOR (MAX817/MAX819 only) MANUAL RESET INPUT (MAX819 only) |
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