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MAX6304CUA Datasheet(PDF) 3 Page - Maxim Integrated Products |
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MAX6304CUA Datasheet(HTML) 3 Page - Maxim Integrated Products |
3 / 12 page +5V, Low-Power µP Supervisory Circuits with Adjustable Reset/Watchdog _______________________________________________________________________________________ 3 10,000 0 0.001 0.01 0.1 1 10 100 1000 RESET TIMEOUT PERIOD vs. CSRT 1 CSRT (nF) 10 100 1000 VCC = 5V 10,000 0 0.001 0.01 0.1 1 10 100 1000 EXTENDED-MODE WATCHDOG TIMEOUT PERIOD vs. CSWT (WDS = VCC) 1 CSWT (nF) 10 100 1000 VCC = 5V 10,000 0.1 0.001 0.01 0.1 1 10 100 1000 NORMAL-MODE WATCHDOG TIMEOUT PERIOD vs. CSWT (WDS = GND) 1 CSWT (nF) 10 100 1000 VCC = 5V ELECTRICAL CHARACTERISTICS (continued) (VCC = +2V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V and TA = +25°C.) Note 1: Reset is guaranteed valid from the selected reset threshold voltage down to the minimum VCC. Note 2: WDS = VCC, WDI unconnected. Note 3: Precision timing currents of 500nA are present at both the SRT and SWT pins. Timing capacitors connected to these nodes must have low leakage consistent with these currents to prevent timing errors. Note 4: The sink/source is supplied through a resistor, and is proportional to VCC (Figure 8). At VCC = 2V, it is typically ±24µA. __________________________________________Typical Operating Characteristics (CSWT = CSRT = 1500pF, TA = +25°C, unless otherwise noted.) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS WATCHDOG TIMER VIH 0.7 x VCC WDI, WDS Input Threshold VIL 0.3 x VCC V VCC = 4.5V to 5.5V 30 WDI Pulse Width tWP VCC = 2V to 4.5V 60 ns WDI, WDS Leakage Current Extended mode disabled ±1 µA WDI Sink/Source Current (Note 4) Extended mode enabled ±70 µA WDS = GND, CSWT = 1500pF 2.8 4.0 5.2 ms Watchdog Timeout Period (Note 3) tWD WDS = VCC, CSWT = 1500pF 1.4 2.0 2.6 s |
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