Powering Analog Switch Above Recommended Voltage Ratings

Thread Starter

SkiBum327

Joined Apr 29, 2019
1
Hi Guys,

I'm new here. I'm looking to incorporate some analog switches into my circuit design (https://www.nxp.com/docs/en/data-sheet/NX3L1G66.pdf).

In the datasheet, it is stated that the supply VCC as well as the logic signal for the switch (open / close) should not exceed 4.6V, but that the signal passing through the switch can go up to 4.6 + 0.5 = 5.1 V.

My main bus is at 5V, and the logic signals I am connecting are also at 5V.

I am wondering, is it okay to use 5V rather than the specified 4.6V?

If this is not recommended, is it reasonable to down regulate from 5 to 4.6, since in my (limited) experience, linear regulators require a decent dropout voltage.
 

dl324

Joined Mar 30, 2015
9,331
Welcome to AAC!

It's inadvisable to operate any device at it's absolute maximums.
upload_2019-4-29_10-37-23.png

The device is spec'ed for operation from 1.4-4.3V.
upload_2019-4-29_10-36-44.png
 

crutschow

Joined Mar 14, 2008
23,772
That switch is designed for 3.3V systems.
Buy one that's rated for over 5V maximum or 5V nominal, perhaps like one below:
upload_2019-4-29_11-7-21.png
 
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