TVS Selection for JTAG IF

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joli_601446
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Hello, I'm doing a design with a PSoC5 CY8C5888AXQ-LP096 microcontroller on my board with a JTAG interface for debug/programming.

MCU_JTAG.jpg

I am powering the device with 3.3V. I'm using a TVS Diode on pin 1 of the JTAG connector. The TVS I have chosen has the following specs:

Voltage Reverse Standoff 3.3V
Voltage Breakdown 5V
Voltage Clamping max 14.1V

Current Peak Pulse 11.2A (8/20µs)

Does this TVS Diode (part# CPDQ3V3-HF) sound like a good fit for the design?

Thanks,

Joe

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1 Solution
Vison_Zhang
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First comment on KBA 750 replies posted 250 sign-ins

It is OK i think, but you make must sure the board won't be powered by 5V power supply or external programming tool(if power cycle programming mode is chosen) if there has no 3.3V LDO converter on your board.

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2 Replies
Vison_Zhang
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First comment on KBA 750 replies posted 250 sign-ins

It is OK i think, but you make must sure the board won't be powered by 5V power supply or external programming tool(if power cycle programming mode is chosen) if there has no 3.3V LDO converter on your board.

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Hello, thank you for responding to my post. Yes, the board will not be powered by 5V or an external programming tool. I only have 3.3V going to the power pins.

Thank you,

Joe

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