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Part Number: TXB0108
The TXB0108 datasheet gives the following guidance on power sequencing:
"During operation, ensure that VCCA ≤ VCCB at all times. During power-up sequencing, VCCA ≥ VCCB does notdamage the device, so any power supply can be ramped up first."
We are in a system in which we do not control power sequencing. We know the supplies come up at roughly the same time but there is the possibility there is some small amount of time (a few ms) where VCCA > VCCB, Is this time delay an issue and could you provide some guidance on when this might be a problem? For reference OE is tied directly to VCCA.
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In reply to Karan Kotadia:
In reply to Calvin Field:
VCC25 and VDD33.pdf
The attached file contains a scope plot showing power sequencing between VCCA (2.5V) Yellow and VCCB (3.3V) Blue. VCCA start leads VCCB by 9 mS.
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