Dears,
We are using IC SN74HCT125D in our designs.
We are facing issue of IC getting short VCC to GND (VCC and GND pins are observed shorted together).
We are observing this problem repeatedly.
VCC and inputs of SN74HCT125D is about 5VDC clean and not exceeding.
Please note that the we have cable length of about 30 meter long which carries 24VDC and from this 24VDC we have generated 5 VDC using DC to DC converter LM2672M_ADJ.
This power supply is also protected with transorb, ferrite bead in series with output and input and output capacitor filters.
Possible causes of IC damage?
What are the parameters which can damages the IC?
Preventive measure and circuit protection guidelines?
Types of Measurements in filed to find out the root causes?
Design support for robustness improvement to avoid failure?
Please see attachment for the IC damage images