I found a strange 6-pin chip with a barcode and SA20 imprinted on the back of it, The front has a hex shape deeply engraved on it. I looked up the chip online and I couldn't find any information on it. What is this chip and what is it used for?

Back of the chip.

enter image description here

  • \$\begingroup\$ It might help if you added some details about where you found it, IE was it plugged into something, etc. \$\endgroup\$ – Tyler Apr 15 '16 at 1:26

It is a 'crash sensor' used to deploy automotive airbags.

Datasheet here- made by Sensonor in Norway.

  • \$\begingroup\$ Can this chip be used for another purpose like putting it inside a ball to detect when it collides with a wall or floor and then sending a wireless signal to make a sound in a loud speaker? \$\endgroup\$ – user148298 Apr 15 '16 at 2:29
  • \$\begingroup\$ Looks to me like it's only sensitive in one axis, so I guess you'd need three and some signal conditioning circuitry and a microcontroller/transmitter with ADC. \$\endgroup\$ – Spehro Pefhany Apr 15 '16 at 3:01
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    \$\begingroup\$ How about putting it inside a seat cushion and when some one sits on it, it makes starts to over inflate and a recorded voice from a speaker inside the cushion says "Get your butt off me" \$\endgroup\$ – user148298 Apr 15 '16 at 3:05
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    \$\begingroup\$ It's basically an 50g accelerometer element, which I think would make a lousy butt sensor. A "poorly performing" sensor, just to make that statement 100% clear. \$\endgroup\$ – Spehro Pefhany Apr 15 '16 at 3:15
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    \$\begingroup\$ @Aron 50g should work for the American market. I'll get a lower g setting for the international market. \$\endgroup\$ – user148298 Apr 15 '16 at 13:48

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