Small Signal Product

CIRCUIT BOARD LAYOUT RECOMMENDATIONS

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To protect data lines and the power line, connect pin 5 directly to the VDD. In this configuration the data lines are referenced to

the supply voltage. The internal TVS diode prevents over-voltage on the supply rail.

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The TESDS5V0A can be isolated from the power supply by adding a series resistor between pin 5 and VDD. A value of 100kΩ is

recommended. The internal TVS and steering diodes remain biased, providing the advantage of lower capacitance.

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In applications where no positive supply reference is available, or complete supply isolation is desired, the internal TVS may

be used as the reference. In this case, pin 5 is not connected. The steering diodes will begin to conduct when the voltage on

the protected line exceeds the working voltage of the TVS (plus one diode drop).

Document Number: DS_S1501025

Version: D15

Data Line Protection Using Internal TVS Diode as Reference

Data Line and Power Supply Protection Using Vcc as reference

Data Line Protection with Bias and Power Supply Isolation

TESDS5V0A

Taiwan Semiconductor