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I came across a datasheet that says: http://www.analog.com/media/en/technical-documentation/data-sheets/hmc197b.pdf

I want to know what does this: "do not “hot switch” power levels greater than +20 dBm (Vctl = +5Vdc)" means.

Based on its truth table, I "assume" that it is forbidden to simultaneously apply +5V on both control inputs. http://www.analog.com/media/en/technical-documentation/data-sheets/hmc197b.pdf

The device here is a HMC197BE, GaAs MMIC SOT26 SPDT SWITCH. Here is the link to the datasheet: http://www.analog.com/media/en/technical-documentation/data-sheets/hmc197b.pdf

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The device gate junction may be damaged by reactive voltage coupling effects of DC during high RF conduction. The step function should be avoided

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