Is there some people can recognize these electronic components?

Other Hardware General Electronics
1

Hello everyone:

I have three electronic components, they often appear in my electronic boards, but I completely don't know what they are and what are they used for.

Now I want to buy these electronic components myself, I try to search them through smd code on google or sites like http://www.smdcode.com/en/smd, but I didn't find the certain type of them, can anyone tell me the complete type of them?

Marking: "GT9U", Size: "3.0*1.5mm", Pins:"5"

Marking: "AZt", Size: "2.0*1.0mm", Pins:"3"

Marking: "AC3", Size: "2.0*1.2mm", Pins:"5"

Can someone help me? I would be very grateful.

YanDong

2

perhaps this one for the AC3
sn74ahc1g04.pdf
SN74AHC1G04DCKR ACTIVE SC70 DCK 5 3000 Green (RoHS
& no Sb/Br)
CU NIPDAU Level-1-260C-UNLIM -40 to 85 (AC3 ~ ACG ~ ACL ~

This one for the GT9U
AP2127N-2.5TRG1 GT9
AP2127.pdf

but why do you want to do back engineering? to repair?

3

Hi Genesis92:

Thank you very much, I think you are right.

I bought some electronic boards from abroad, several of them is broken, the factory does not provide any technical support, I can only send them back to the factory, but the time and the postage are unbearable for me.

I carefully compared the good and bad of electronic boards, I found that there are just some electronic components was burned down, so I want to understand and fix them.

Now I think I can try to repair it, really very grateful to you.

4

Hi Genesis92:

I've just seen the AP2127.pdf, why the "AP2127N-2.5TRG1 GT9" Package is "SOT-23", Instead of "SOT-23-5", "SOT-23" package only have 3 pins, in fact it should be 5 pins.

5

My bad.
I get these answers from my SMD databook
the 9 is perhaps an option. check the datasheet of these IC

1395×123 41.6 KB

R1112N
edit
R1112N371B code GT but it's 4 digits not 3...
perhaps make measures on a working board to find his function
1370×243 74.9 KB

1288×309 126 KB

6

Hi Genesis92:

OK, Thank you very much for your help, depending on your tips, I think I can find the right type of these components, many thanks again.

7

no problem :slight_smile:

8

Hello everyone:

I still don't know what is the electronic components of marking"AZt", I cannot judge it completely by the marking.

I have tried using a digital multimeter to do some tests, who can help me to continue to recognize what it is.

I switched digital multimeter to diode test option and resistance test option.

Here is what I found.

First, I use the red wire(+) connected 3 pin, the black wire(-) connected 2 pin, the voltage shows overload, the resistance shows overload. In turn, I use the red wire(+) connect 2 pin, the black wire(-) connect 3 pin, the voltage shows 0.6v, resistance shows 26M ohm.

But when I use the red wire(+) connect 1 pin, the black wire(-) connect 2 pin using diode test option.

Then, I found the voltage and the resistance values of 3 to 2 and 2 to 3 all has changed, the voltage changed to 0V, the resistance changed to 0 ohm.

But if I use the red wire(+) connect 2 pin, the black wire(-) connect 1 pin using diode test option,
the voltage and the resistance values of 3 to 2 and 2 to 3 all will go back to the start of the measured values.

At the same time, I looked at my circuit boards, I found most 1 pins seem are connected to 3.3v, 2 pins connected to SCL, SDA or maybe something else, most 3 pins are connected to 5v voltage or seems empty.

depending on Genesis92'S tips, Is this "Vdet-IC"? If it is, how do I determine the parameter is 2.2V or 3V? and PPO or ODO?

9

:cry: :cry: :cry: :cry: :cry: :cry: :cry: :cry: :cry: who can help me.

10

Hi, your AZt component sounds like a N Ch- MOSFET, you are putting charge onto the gate pin1, that makes 3 the drain and 2 source conduct.
Then when you tested the gate with the leads the other way you discharged the gate and the Drain Source went back to open circuit with protection diode across drain and source.

Tom...... :slight_smile:

11

Hi Tom:
Thank you very much, I think you are right, I also seems to find "F3t" and "AZt" N channel MOSFET
from NXP.