PI3VT3245QE

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Logic - Signal Switches, Multiplexers, Decoders includes products that perform logic functions or transfer data from multiple input sources to a single output. Among them, the PI3VT3245QE from Texas Instruments is widely used. The following analysis focuses on its application field and working principle.

Application Field of PI3VT3245QE

The PI3VT3245QE is a Low Capacitance ESD (electrostatic discharge) protection array, compliant to IEC 61000-4-2. The device is designed to protect four high-speed data lanes, and eight single-ended service lines. It features up to 15kV ESD protection, operating over the -40 to +85C temperature range, in a compact 6-pin TDFN SMD package. It is ideal for stress protection of high-speed data and video lines in systems such as routers, network switch, optical modules, display ports and USB Type C connectors.

The PI3VT3245QE is also widely used in other areas such as automotive infotainment and telematics, industrial and medical applications. The device is key to providing protection from voltage surges and short circuits that are prevalent in harsh operating environments. It is also provided with commendable EFT (electromagnetic fields) protection.

Working Principle of PI3VT3245QE

The PI3VT3245QE is composed of four bidirectional electrostatic discharge (ESD) channel protection arrays integrated with an EFT protection cell each, along with its associated circuits. It supports up to 8 service lines, similarly with four high-speed data lanes. Data lanes shield each other so they are also called shielded lanes. The data lanes are also protected from each other, up to 3kV, which allows for certified compliance to the IEC 61000-4-2 international standard for EFT protection.

The device is further provided with an active clamping circuit for each of the four ESD channel protection structures. It guard against voltage surges up to 15kV on the four data lanes, by immediately clamping the transient flash over-voltage to an internal “safe” level. An extra protection circuit is designed to contain any potential ESD stresses to a manageable level while maintaining low static power consumption.

The PI3VT3245QE is designed with an internal common-mode controller that helps minimize the effect of common-mode noise. This circuit is programmed to keep the I/O power rails at the same level, resulting in improved signal integrity throughout the array. Together with its low capacitance, this makes the PI3VT3245QE suitable for high-speed differential signal transmission up to 12.5Gbps per lane.

Conclusion

The PI3VT3245QE from Texas Instruments can provide outstanding protection for four differential high-speed data lanes and eight single-ended service lines. With maximum 15kV ESD protection, operating from -40 to +85C temperature range, it lends a helping hand in meeting the IEC 61000-4-2 international standard for EFT protection. The device array also offers remarkable common-mode noise reduction and signal integrity enhancement, making it an ideal choice for any protection solutions.

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