Reset of HMC704

nrsk on Nov 12, 2021

hello,

I am considering a power-on reset for the HMC704.

Is it a problem that 3.3V power supply is "ON => OFF => OFF" while 5V power supply is applied to the HMC704?

Best regards,

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aandrews
Nov 16, 2021 +1 verified
Should be okay to leave 5V supply powered while 3.3V supplies are off. We don't have any reliability data at this condition to confirm this though, so to be safe I would recommend brining them off/on at…
aandrews
Nov 22, 2021 in reply to nrsk +1 verified
Hi, it is not recommended to have CP supply (5V in this case) disabled when the other supplies enabled as damage can occur

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+1 aandrews

on Nov 16, 2021 12:25 PM
Should be okay to leave 5V supply powered while 3.3V supplies are off. We don't have any reliability data at this condition to confirm this though, so to be safe I would recommend brining them off/on at reasonably close to the same time if possible.

It is more important that the 3.3V supplies should not be on when 5V is off, as this can result in damage. Also important to keep the two 5V supplies (VDDCP and VDDLS) at the same voltage.
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0 nrsk on Nov 18, 2021 8:14 AM in reply to aandrews

Hello,

If 3.3V is supplied when 5V is off, will it be damaged ?

Or is there no reliability data to recommend it ?

Best Regards,
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+1 aandrews

on Nov 22, 2021 1:54 PM in reply to nrsk
Hi, it is not recommended to have CP supply (5V in this case) disabled when the other supplies enabled as damage can occur
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+1 aandrews

on Nov 22, 2021 1:54 PM in reply to nrsk
Hi, it is not recommended to have CP supply (5V in this case) disabled when the other supplies enabled as damage can occur
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