Testing and inspection

Which items are mainly checked in an AC test?

  1. ALeakage current of I/O pins
  2. BSignal timing characteristics such as propagation delay and setup time
  3. CThe appearance of the package
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Answer: B. Signal timing characteristics such as propagation delay and setup time

An AC test measures time-related characteristics such as propagation delay from input to output, setup and hold times, and output rise and fall times. DC characteristics are checked by DC tests and logic function by functional tests.

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More Testing and inspection questions

  1. What is the technology called that expands test patterns inside the chip and compresses the responses to reduce scan test data volume and test time?
  2. What is the test called that runs at the actual operating frequency to detect defects where signals propagate too slowly?
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