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VNQ830

This small signal diode can be safely shared amongst

several different HSD. Also in this case, the presence of

the ground network will produce a shift (

j600mV) in the

input threshold and the status output values if the

microprocessor ground is not common with the device

ground. This shift will not vary if more than one HSD

shares the same diode/resistor network.

LOAD DUMP PROTECTION

same applies if the device will be subject to transients on

ISO T/R 7637/1 table.

µC I/Os PROTECTION:

If a ground protection network is used and negative

in line to prevent the

µC I/Os pins to latch-up.

The value of these resistors is a compromise between the

leakage current of

µC and the current required by the

HSD I/Os (Input levels compatibility) with the latch-up limit

of

µC I/Os.

Calculation example:

5k

Ω ≤ R