Hex/Quad, Power-Supply Supervisory Circuits
OVERVOLTAGE
THRESHOLD
VIN
PRIMARY
THRESHOLD
OV
RESET
Figure 2. Output Timing Diagram
tOP
tRP
2.5V
VCC OR IN1–IN4
WDO
RESET
WDI
tD-PO tRP
*tWDI
tWD
*tWDI
WDO NOT CONNECTED TO MR
*tWDI IS THE INITIAL WATCHDOG TIMER PERIOD
2..5V
VCC OR IN1–IN4
WDO
RESET
WDI
tD-PO tRP
*tWDI
tWD tRP *tDWI
WDO CONNECTED TO MR
Figure 3. Watchdog, Reset, and Power-Up Timing Diagram
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