Other Parts Discussed in Thread: TMUX6211, TMUX4827, INA821, INA849, TMUX7412F
Dear Friend
TMUX6212 seems to have all switches "normally closed" versus TMUX6211 as "normally opened". I know these are not mechanical switches, so, before powering on, they should be all opened, question is only due to the power on period.
However, since TI created part TMUX6212 and symbolized the switches as "normally closed". I do need to understand deeply how these switches behave (and status) during power on and up to 80-90% of power on, or, at which power level they start to behave differently from powering on.
I assume they are opened before the power is on, and start to act (to close) according to the input control pin after reaching a certain level of power voltage. if this is true, this part will behave the same as the TMUX6211, why create this part? Just for getting different logic level of input control signal?
Someone might guess that this part (as well as TMUZ6211) will be set at its symbolized "normally status" when the power voltage reaches 4.5V (which is the starting working voltage), while the input control signal only be activated when the power voltage becomes stabilized (no more increasing), then, the switches begin to change its status according to the input control signal.
I am not sure which above guessing is correct. Please give me an elaboration.
Thanks
Tony