MPQ6411―WINDOWED WATCHDOG TIMER, AEC-Q100 QUALIFIED
PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE
MPQ6411 Rev. 1.1 www.MonolithicPower.com 7
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PIN FUNCTION
Pin # Name Description
1 WDO
Watchdog output. WDO outputs a reset signal to the MCU.
MPQ6411 WDO is the output of a inverter, it is not must to connect WDO to VCC or
another voltage source through a resistor.
MPQ6411-33 WDO is the open drain of a MOSFET and should be connected to
VCC or another voltage source through a resistor (e.g.100kΩ).
2 WDI Watchdog input. WDI receives the trigger signal from the MCU.
3 MODE
Mode switching pin. Pull MODE high to make the watchdog operate in long window
mode; pull MODE low to make it work in short window mode. MODE has a weak
internal pull-up.
4 GND Ground.
5 NC Not connected.
6 VCC Power input.
7 TIMER Watchdog timer pin. TIMER sets the time-out with an external resistor
8 /WD_DIS
Watchdog disable pin. Pull /WD_DIS low to disable the watchdog; pull
WD_DIS
high to enable the watchdog. It has a weak internal pull-up.
