Special handling precautions should be taken when working with MOS devices. The statement which is not true is

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SDSC ISRO Technical Assistant Electronics 8 April 2018 Official Paper
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  1. All test equipment should be grounded
  2. MOS devices should have their all leads shorted together during shipment and storage
  3. Never remove or insert MOS devices with the power on
  4. MOS devices do not require grounding straps used for CMOS

Answer (Detailed Solution Below)

Option 4 : MOS devices do not require grounding straps used for CMOS
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Some special precautions should be taken while working with MOS devices. This includes:

  • Equipment should be grounded while testing and measuring
  • Do not touch the MOS IC pin from fingers.
  • All the pin should be shorted together while shipment and storage
  • Never remove or insert MOS device with the power supply ON
  • Grounding straps used while working on the MOS device. An open terminal is prone to random picking of signals.
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