Contents
Does USB need ESD protection?
Protecting the USB 2.0 ports from disastrous ESD events is mandatory. No user would like to experience damage to his or her electronic equipment due to an ESD event triggered through the USB interface. Semtech’s wide range of TVS diodes protect many of the world’s most popular electronics devices.
What is the differential impedance of a USB interface?
The USB 2.0 specification defines a differential characteristic impedance of 90 ohms, plus or minus 15%, for the USB 2.0 differential pair. The USB 3.0 specification defines a differential characteristic impedance range of 72 ohms to 120 ohms.
How does ESD protection work?
In the event of an ESD strike, the ESD diode would breakdown and create a low impedance path that limits the peak voltage and current by diverting the current flow to ground, thereby protecting the IC . ESD strike with protection.
How do I choose an ESD?
To obtain good ESD protection performance, select a TVS diode with the clamp voltage higher than the line voltage. Select a TVS diode with a guaranteed ESD tolerance level higher than the system’s ESD immunity requirement.
Is USB a differential signal?
USB uses a differential signaling for data transmission, which is encoded using NRZI and is bit-stuffed to ensure adequate transitions in the data stream for reliable clock recovery.
How do you protect electronic devices from ESD?
Use anti-static packaging: ESD packaging is one of the most effective tools for protecting against ESD. Components can be stored in anti-static packaging when not in use, protecting them from ESD from any source. This is also one of the most effective ways to prevent ESD-related damage during shipping.
What is meant by ESD protection?
An ESD protection device protects a circuit from an Electrostatic discharge (ESD), in order to prevent a malfunction or breakdown of an electronic device.