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Original question:

TCA9509: pull-ups on the A SIDE

TCA9509: Is the A-side "current source"(while VCCA is still valid) still enable while the EN is low?

Andy_Lin
Intellectual 2800 points

Part Number: TCA9509

Tool/software:

Hi Team,

As subject , due the A side had the internal current source feature which no needed external pull up on A side, 

we would like to ask , in normal operation while the VCCA/VCCB are both valid on device , if we set the "EN" pin as low and turn off the A/B side's driver , is the A-side "current source" still enable?

or the internal current source on A side will also disable while the driver are being disable when EN is low? 

Andy