Place the external components as close to the device as
possible. This configuration prevents parasitic errors from occurring.
Avoid using long traces for
the VDD supply node. The VDD capacitor, along with parasitic inductance from
the supply to the capacitor, can form an LC circuit and create ringing with
peak voltages above the maximum VDD voltage.
Avoid using long traces of voltage to the MON pin. Long
traces increase parasitic inductance and cause inaccurate monitoring and
diagnostics.
If differential voltage sensing is required for
MON2 and/or MON3 and/or MON4 route RS_2,3,4 pin to
the point of measurement. If RS_2,3,4 are not
routed to the point of measurement, then route
RS_2,3,4 to the GND pin of the device.
Do not run sensitive analog traces in parallel with digital
traces. Avoid crossing digital and analog traces if possible, and only make
perpendicular crossings when absolutely necessary.
For logic pins such as WD_EN and ESM, make sure
the correct pull-up/down voltage is applied as per
device logic levels for the associated
functionality.
For open-drain outputs like WDO, NIRQ, and
NRST, select a pull-up resistor value such that
the absolute maximum ratings of the device are not
violated.