# What would the maximum current draw for this chip be?

I am looking at using this logic switch in my circuit:

https://www.onsemi.com/pub/Collateral/FSTD16211-D.pdf

Looking at the datasheet I am finding it hard to figure out what the maximum current draw would be.

As far as I can see, I need to supply:

5v drawing potentially up to (what)mA?

Am I safe to assume that it will be 5v and definitely under 100mA? I need to know so I choose the correct level shifter supplying the 5v!

Many thanks!

• Bit strange yes. 7 ohms times the current squared will give you the heat dissipation in watt, but without the thermal resistance (K/W), you can only estimate how much headroom there is. – winny Jan 7 at 16:49
• shall I assume that it will be 5v and definitely under 100mA? I need to know so I choose the correct level shifter supplying the 5v! – RenegadeAndy Jan 7 at 17:00
• But what is your output or downstream load current? – winny Jan 7 at 17:02
• On page 3: Incraese in $I_{CC}$ per Cotrol Input = 2.5mA max + Quiescent Supply Current = 1.5mA. There are only two control inputs. – StainlessSteelRat Jan 7 at 17:14
• Ok so that means it would likely draw a max current of 8mA? – RenegadeAndy Jan 7 at 20:02