ESD SPI/ISP bus protection

by Алекс Гарисон   Last Updated October 09, 2019 13:25 PM - source

I am designing a board based on the Atmega328P microcontroller. For this controller there is an ISP connector for programming. This connector has the following pins: MOSI / MISO / RST / SCK.

There is a task to protect this tire from electrostatic discharges.

To protect IO / I2C / UART, I use NUP4114.

Scheme:

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It is designed to protect several IOs simultaneously.

Question: Is this circuit suitable for ISP / SPI line?

Tags : spi esd isp


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