Кроме того, сотрудники американской разведки «давно обеспокоены» расширением использования беспилотников мексиканскими наркокартелями и возможности применения этой технологии для нападения на американские войска и персонал вблизи мексиканской границы.
Последние новости
。wps对此有专业解读
With the crystal out of the way, we see the package has three levels internally: the controller die (containing the oscillator driver, temperature compensation, and output divide-by-two) sits in a cavity at the lowest level, attached via a dark colored adhesive rather than the usual silver-filled epoxy (presumably because the package is not electrically conductive thus there is no point in using an expensive metal filled adhesive to ground the die backside).
* this is not required but highly recommended to provide "safeguards"