Part Number: TCA9534
TCA9534 Vcc =3.3V， interrupt pin is open-drain , this pin can be pulled up to 1.8V ？
Yes, since the INT is open-drain it can support any pull up Vcc so long as it is within the recommended operating conditions and tied from INT to Vcc using a resistor (do not tie INT directly to Vcc without some kind of resistance).
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In reply to BOBBY:
Sorry that I double confirm with you, my mean is that Vcc pin actually connected to 3.3V power supply, now customer wants to connect INT to 1.8V with a resisitor, now INT pull high power is different from Vcc. is it ok ?
In reply to Cooper Zhang1:
Yes, that is correct.
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