So....
I have a part I need to identify It seems to be analog but I can't figure out what this device is.
5 of them are on the pcb and all made a dead short to ground. The short was gone after desoldering these 5 chips and a USB 3.0 distribution ic.
Markings on the device:
AG02 16 // I think the 16 stands for the production year but I am not sure.
Package size:
TSOP6/SOT23-6/SC74 // or somewhere around there.
Fixed values:
Pin 2 / GND
Pin 5 / VCC // 4.7V measured
Pin 1, 3, 4, 6 button connections // input and output at the same time?!?
These pads (1,3,4,6) all measure 2.5V when no buttons are pressed.
Pin 1: // 3 buttons are connected to the unknown IC via a resistor network.
Button 1 pressed = 0.4V
Button 2 pressed = 1.4V
Button 3 pressed = 2V
Pin 3: // 4 buttons are connected to the unknown IC via a resistor network.
Button 1 pressed = 0.4V
Button 2 pressed = 0.8V
Button 3 pressed = 1.4V
Button 4 pressed = 2V
Pin 4: // 1 button is connected to the unknown IC
Button 1 pressed = 0V
Button 1 not pressed around 14K to ground
Button 1 pressed around 100Ohm to ground
Pin 6: // 1 button is connected to the unknown IC
Button 1 pressed = 0V
Button 1 not pressed around 14K to ground
Button 1 pressed around 100Ohm to ground
What kind of device is this???
I am guessing that one of the single button pads is the output. One of them is the power on button if I am not mistaken.
Thanks in advance and best regards from Germany!