Datasheet MAX6369, MAX6370, MAX6371, MAX6372, MAX6373, MAX6374 (Maxim) - 4

Pin-Selectable Watchdog Timers ELECTRICAL CHARACTERISTICS (continued)
(VCC = +2.5V to +5.5V, SET_ = VCC or GND, TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C and VCC = +3V.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Watchd og Inp ut P ul se Wi dth tWDI After WDO deasserted 100 ns (Note 2) MAX6369/MAX6371/MAX6373 100 300 ms Watchdog Output Pulse Width tWDO MAX6370/MAX6372/MAX6374 1 3 ms Internal Setup Time t (Note 4) SETUP After WDO deasserted 100 300 ms
Note 1:
Production tested at TA = +25°C. Guaranteed by design over temperature limits.
Note 2:
Guaranteed by design.
Note 3:
In this setting the watchdog timer is inactive and startup delay ends when WDI sees its first level transition. See Selecting Device Timing for more information.
Note 4:
After power-up, or a setting change, there is an internal setup time during which WDI is ignored.
MAX6369–MAX6374 Typical Operating Characteristics
(Circuit of Figure 1, TA = +25°C, unless otherwise noted.)
SUPPLY CURRENT WATCHDOG TIMEOUT PERIOD vs. TEMPERATURE vs. TEMPERATURE
14 1.003 1.002 12 MAX6369/74-01 MAX6369/74-02 µA) V 1.001 CC = +5.5V 10 1.000 8 V 0.999 SUPPLY CURRENT ( CC = +2.5V 6 0.998 NORMALIZED WATCHDOG TIMEOUT PERIOD 4 0.997 -40 -15 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (°C) TEMPERATURE (°C)
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