Please ID these chips in my WNDR4000 router

Question

There are 5 chips, E,C,and B say:&nbsp;FoxconnW40194V-01109A19A20A81&nbsp;Chips A and D say:&nbsp;FoxconnW40194V-01109A18A21&nbsp;I would like to know which chips are for 2.4 Ghz and which are for 5 Ghz ?&nbsp;Do these all transmitt and receive or are some only for recive or only for transmitt ?&nbsp;I am guessing the A18, A19,A20,A21,A81 numbers are the frequencies that the chips can do&nbsp;Can you tell me what freq range ( band ) each A number has ?&nbsp;Thank YouWNDR4000 need to ID chipset

antinode · Answer

&gt; There are 5 chips, E,C,and B say: [...]&nbsp;&nbsp;&nbsp; I can't (yet) see your picture.&nbsp; In-line images must be approved bya moderator before others can see them.&nbsp; The time required varies.Attachments have no such limitation.&nbsp; Of course, attachments have theirown one-per-message limitation.&nbsp;&gt; 94V-0&nbsp;&nbsp;&nbsp; What are you reading?&nbsp; Silk-screened labels on the PCB, or markingson some part, or what?&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; https://en.wikipedia.org/wiki/UL_94&nbsp;&gt; I am guessing [...]&nbsp;&nbsp;&nbsp; You certainly seem to be.

simard · Answer

I am reading each line of white printed text that is directly on the black I C chips
The chips are made by foxconn and I cannot find any information about the chips on their website

I need to know what frequencies each one of these chips can transmit and receive on

A18, A19, A20, A21, A81 are the bands / frequencies that are printed

The other numbers and letters means other things, like the 94-0
As you have linked the wiki article about

The 1109 must mean something
But the information I need is the bands of each chip

They used 2 different chips
So 3 of 1 chip are used and then 2 of the other chip are used

Thanks

antinode · Answer

&gt; The 1109 must mean something&nbsp;&nbsp;&nbsp; Looks to me like a date code, YYWW: Year [20]11, week 9.&nbsp;&gt; I can't (yet) see your picture. [...]&nbsp;&nbsp;&nbsp; All still true.

wcalifas · Answer

Those are the internal antennas for the wifi.&nbsp;

simard · Answer

I know these are the internal antenna chips I need to know what frequency ranges each chip hasThe a19 a20 a21 a81Those correspond to specific frequency ranges specific bands and I need to know what bands what frequencies each chip can doThe one set of chips that doesn't have the a81 does one band and the others do another band and since it's 2.4 GHz and 5.8 GHz one set of chips can do the 5.8 GHz and the others do the 2.4 gigahertz but I need to know which chips are which

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Please ID these chips in my WNDR4000 router

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