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How can latch-up be effectively prevented for an analog switch (SW)?

Latest Updated:09/01/2007

Question:

How can latch-up be effectively prevented  for an analog switch (SW)?

Answer:

Think of it as being the same as an ordinary CMOS logic IC.
The following are examples of ways to prevent latch-up.

  • Insert, in series, a resistor to control line to a pin such as S or D of the IC
  • Insert a resistor (100 to several hundred Ω) between the power supply source and power supply pins
  • Externally connect a protection diode (between the power supply and the pins such as S and D).
  • Combine the above
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