In my job I came across reading a customer schematic. I am facing trouble in identifying the marked part of the schematic, which is connected at the pins of uUSB Interface Controller.

It seems like a fuse but not very sure of the symbol, as its confidential, unfortunately the engineer did not give a part name also. Any way, it doesn't effect the design but I am eager to know about it out of interest.

The design is of a mobile phone.

Schematic containing the unknown symbol

  • 2
    \$\begingroup\$ Maybe a ferrit bead, I am not sure. \$\endgroup\$ Commented Apr 7, 2015 at 11:31
  • \$\begingroup\$ I honestly have no idea. Maybe ask the designer? \$\endgroup\$
    – Dzarda
    Commented Apr 7, 2015 at 11:36
  • \$\begingroup\$ Can you share the part number of the IC with the BOOT and JIG pin? \$\endgroup\$ Commented Apr 7, 2015 at 11:53
  • \$\begingroup\$ @BattleHamster its SM5504, any way you will not find even if you google. as its confidential. kindly let me know if you did :) \$\endgroup\$
    – kakeh
    Commented Apr 7, 2015 at 11:59
  • 3
    \$\begingroup\$ I have to guess as well. But for me it looks like a removable part of the wire (I usualy use a 0R resistor for that) \$\endgroup\$
    – Botnic
    Commented Apr 7, 2015 at 13:11

1 Answer 1


It does not get the same signal i.e JIG_ON_N.

Actually it is shutdown or reset button that requires a short push (push button) that is short this two wires. Search on Eagle

enter image description here

Some times, schematic editor softwares using strange symbols that are not standard for industry.


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