Electronic – What does this schematic symbol mean (similar to solder bridge)
pcbpcb-designschematics
this symbol is similar to solder bridge, but there is a connection on both end.
what does this symbol mean, and what is the equivalent pcb for this symbol
Best Answer
It really is a solder bridge, with a separate trace connection as well. The trace can be cut if needed, and then the solder bridge can be used to rejoin the connection if circumstances change.
This device is a transient voltage suppressor for USB D+ and D- signals. It protects the device from static voltages that may develop when inserting or removing USB devices to connectors.
The four diodes (on side) act as clamping diodes that conduct to suppress ESD.
This or similar device can be found in this Semtech catalog
It is an ESD clamp, showing that the gate is ESD protected. Typically the back to back diodes are shown as Zeners. This scheme protects against positive and negative ESD hits.
In the event of a positive ESD event, the top diode is forward biased, and the bottom diode's reverse breakdown voltage will be exceeded. The ESD is shunted to the source, which is often ground.
In the event of a negative ESD event, the top diode's reverse breakdown voltage is exceeded, and the bottom diode is forward biased. The ESD is again shunted to the source.
Best Answer
It really is a solder bridge, with a separate trace connection as well. The trace can be cut if needed, and then the solder bridge can be used to rejoin the connection if circumstances change.