Identification of component

Other Hardware General Electronics
1

Hi There! I have a Time of flight sensor VL53LOX which I acidently un soldered this component and lost it could someone please identify it for me, it is the red looking item in the pictures.
Thank you
Doug

VL52Lox.jpg
VL52Lox.jpg1000×1000 111 KB

Unknown Item.PNG

2

DougC's pictures:

VL52Lox.jpg
VL52Lox.jpg1000×1000 111 KB

Unknown Item.PNG

3

My guess is that it is a diode, say 1N4148, on the XSHUT (/Shutdown) to allow it to be connected a host pin which exceeds the maximum allowed voltage of the chip.

4

Thank you
for your reply, I am using it with an Arduino Pro Mini is itb required to be there if I amonly using Vcc Gnd SDA and Scl

5

It should be OK. I guess the circuit is derived from this one:

1545×1065 14 KB

If you are not using XSHUT it does not matter. If you do later decide to use it, you must replace the diode (not just bridge it) because the pins on the VL53LOX should not be exposed to more than 2.8 volts.

6

Many thanks

7

That diode is in a MELF package, for completeness. That means leadless.

8

DougC:
Hi There! I have a Time of flight sensor VL53LOX which I acidently un soldered this component and lost it could someone please identify it for me, it is the red looking item in the pictures.

Losing it is not at all surprising.

How you would "accidentally unsolder" it - now that is pretty bizarre! :astonished:

9

DougC

The board you have includes 10 or so components that allow the board to be operated at either 3.3Volts or 5 Volts. The diode is one of these components. This diode configuration only works when that particular input has the following two states to operate:

  1. Open circuit - an internal pull up brings the sensor pin to 3.3v and this diode allows the board input to go to 5V without damaging the sensor

  2. Grounded. For both 3.3V and 5V grounded is the same.

As for replacement you can google 1n4148 as suggested above. They should be able to be found almost everywhere (ebay, Digikey......).

You might also look for a pair of tweezers to hold the new one in place as you solder. And if it was accidentally unsoldered because the iron used was way too large, you might look for a smaller iron and some thinner solder.

BTW a MELF package in leadless (as the photo clearly shows) but more than that the MELF package is electrodes consisting of metal plugs. These plugs allow the diode die to dissipate more heat. However heat dissipation is of no consequence in the design.