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Hello,
i'm trying to design an universal board.
Looking from the board's point of view there are three families of 25G 8-channel devices: BR, MB and DF.
These families differs only within the following pins: D4, D12, E2, E4, E14, F4.
In my case the MUXSEL pins on MB family are not needed since it will be controlled through I2C.
All other pins are GND and/or TEST pins.
Datasheet says that TEST pins should be tied to ground in normal (non-test) operation.
Can i connect all these pins directly to GND without pulldown resistors?
Thank you.
Greetings,
From a robust design point of view, it is recommended to use Resistor to GND. Resistors are used to absorb or current any spike that may arise within the system on powerup.
Regards,, Nasser
It is recommended only to improve stability (because of spikes) or the TEST pins can drive some voltages at powerup an in test mode?
Hi Vitaly,
Yes your understanding is correct. It is used to improve stability.
Regards,, Nasser
OK, i'll try to connect directly to GND. It we encounter any troubles then we'll redesign the board.