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[FAQ] How can I choose a high drive strength device?

Michael Ikwuyum
Mastermind 36955 points

FAQ: Logic and Voltage Translation >  Auto-Bidirectional Level-Shifters > Fixed DIR / DIR CNTRL Level-Shifters >> Current FAQ

Choosing a high drive strength device depends on the below:

  • Static DC drive strength: Drive required for a constant HIGH / LOW i.e. driving LEDs for example. See data sheet specifications for IOH and IOL spec.
  • Transient drive strength: Drive required to (dis)charge high capacitive loads i.e. faster transition times indicates high transient drive. See data sheet specifications for rise / fall times.

For more information, see Understanding Transient Drive Strength vs. DC Drive Strength in CMOS Output Buffers