Need to find a chip marking “mAXB/mAXZ”, two same board, the last letter differ, but in same function,the pin2 is gnd, the pin5 is vcc,pin4 link to a amplifier’s +in pin, so I think it can be a voltage reference or something ,thanks a lot!
Make the photo a little larger to see the resistors and choke next to it.
An Amplifier ,AD8092
I agree but I can’t find it, yet.
Hello @chengguozhang127 !
Thank you for posting to the DigiKey forum.
I will see what information we can find about the chip on your board. In the meantime, could you provide more information about what this board is?
Thank you,
Victoria
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Hello Victoria，
Fisrt of all thanks for your help，this is a 9GHz radar transceiver board.
Have a good day!
CG Zhang
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Is it possible there is a connection on Pins 4 and 6 on that chip or do we think those are NC?
Thank for that information. Do you happen to have the part number for the board?
Based off the mark “m” it is possible that it is from Maxim Integrated.
If we are proceeding with that lead, this is a list of our Maxim products with that packaging type. Click HERE.
Any other additional information you can offer about this board, or the IC part itself, will be very helpful.
Thank you,
Victoria
I went through ADI/Maxim’s selection of 6 pin voltage reference chips, wasn’t able to find a match to that marking.
Hello ,
There is no connection between pin 4 and 6
This is the layout diagram, the upper left is pin1
I am so far in agreement, the only thing I cannot verify is that pin 6 being on a switcher or not. The combination of pinouts available usually do have a GND on pin 4 and/or 2 but they get disqualified with how this one is connected.
This was the set I was revewing for your search. Voltage Reference | Power Management (PMIC) | Electronic Components Distributor DigiKey
As I was typing this replay you said it was a NC pin, that doesn’t match anything I saw.
I’ll let the board work and check the voltage of every pin, see if it help
Sorry i misunderstanding your means, the pin4 and pin 6 do have connections on the board but not connected together
You have resistors from both pins 1 and 3 to ground. Very odd for a Vref to do that. Trying to think of what other device might do that.
Just to help narrow down, is that a SOT23-6 package (plastic part would be about 3mm in the longer dimension), or something smaller?
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yes, this is a sot23-6 package
Findout it is a spdt analong switch, hopefully it will help
Hi @chengguozhang127 ,
The pinout suggests that this is some variant of 3157 analog switch, like this:
Could not find one with a matching marking.
Cheers, heke
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