What is the power on state of the ADG839?
Are most switches non-volatile in the postion they are in when the power is turned off?
My application is dependant that the state will not change when all power to the device is removed.
I am not sure I understand your question. The ADG839 is not designed to operate without power supply and the device has no internal memory to store the status of the switch. The status of the switch is directly set by the logic level applied to the "IN" pin. By hardwiring this pin to a known logic level, the switch will "remember" its status even after the power supply is turned off and then on again.
I am looking to switch chip enable on 2 memories, and they board they are on will be powered down when the application is done for the day.
I can keep it biased full time, but would rather not if I can help, and it still will occaisionally get fully powered off. The intention is the switch will get an input to switch the switch position, and once that is done, it cannot be changed until the board is powered down and the bias on the switch will then get changed at power up preventing the memories from getting switched in operation.
The ADG839 cannot perform the function you need without external components that will set the control pin to the correct logic level to ensure the desired switch position.
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