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I want to know what will happen if i connect common output of the 4X SPDT analog switch together to use it as a 4:1 MUX? I want such configuration because i want low Ron resistance with low cost. The multiplexer available with low ON resistance are not fitting in our cost. We require component with cost lest than 0.3USD|1KU AND Ron less that 10ohm. So looking for some good solution.
can i use TS3A44159 part as 4:1 Mux with connecting COM out together ? How it will affect the system.
There isn't any issue cascading signal switches together to make 4:1 function out of 3x 2:1 switches. However when you cascade the switches you will have 2x the parasitic elements of a FET switch like on-state resistance, capacitance, etc.
I searched your requirements on the TI.com switch selection tool. I used the filters on the left hand side for 4:1 configuration, <10 Ohm Ron, and <$0.30 1ku price which returned 3 results (SN74CBT3253C, SN74CBT3252, and SN74CBTLV3253). Do these not meet your requirements?
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In reply to Adam Torma:
Thank you very much for your efforts.SN74CBTLV3253 can be used the only issue is it has max 40ohm Ron resistance which may cause offset in our readings. I found another part i.e.TS5A3359 which is 3:1 analog switch which i think i can use. Actually i was unaware of SP3T (3:1) type switches that's why i asked for 4:1 configuration.
Thank you TI for always helping us.:-)
In reply to vidula badhe:
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