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The industrial temperature grade of a microcontroller usually spans

  • A.\( 0 \) to \( +70 \) \( ^\circ \)C
  • B.\( -40 \) to \( +125 \) \( ^\circ \)C
  • C.\( -55 \) to \( +125 \) \( ^\circ \)C
  • D.\( -40 \) to \( +85 \) \( ^\circ \)C

Answer: D

Correct answer: \( -40 \) to \( +85 \) \( ^\circ \)C

The four common grades run commercial 0 to +70, industrial −40 to +85, extended or automotive AEC-Q100 grade 1 −40 to +125, and military −55 to +125. Industrial is the one to know because it is the default for anything not in a controlled indoor environment, and the step to +125 usually costs a different die or at least a different price.

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