Footprint unclear part

by Günkut Ağabeyoğlu   Last Updated September 11, 2019 09:25 AM

I am trying to draw a footprint of some component which has 8 pins but in the document they shared for outline dimensions and footprint: Outline dimensions Footprint

There is some rectangle in the middle of the footprint. That has sx and sy dimensions. That part confused my mind. Is it silkscreen?

Tags : footprint

Answers 2

enter image description here

It's a thermal pad to improve heat conductivity thus allowing the device to operate with higher electrical powers. Check the data sheet of the actual part.

Andy aka
Andy aka
September 11, 2019 08:46 AM

This is not a silkscreen, but is a thermal pad.

You will find in many ICs which deals with good amount of power / wattage. Thermal pads (also called thermally conductive pad or thermal interface pad) are a pre-formed square or rectangle of solid material (often paraffin wax or silicone based) commonly found on the underside of heatsinks to aid the conduction of heat away from the component being cooled. It helps to decrease the temperature of the surface of IC.

September 11, 2019 08:56 AM

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