- Ask a related questionWhat is a related question?A related question is a question created from another question. When the related question is created, it will be automatically linked to the original question.
Original question:
SN74LVC1T45: SN74LVC1T45 output is too much rising edge noise
Tool/software:
TI experts,
My application using this device requires switching VCCA via a transistor to induce tristate condition.
The specification SCES515M states: The VCC isolation feature is designed so that if either VCC input is at GND, then both ports are in the high-impedance state. Please expand on "...either VCC input is at GND"
Is this a high impedance state (ie. VCC is disconnected) or is there an impedance required to GND eg. a pulldown resistor or is there a minimum current into VCC. I see mention of Ioz in the Electrical Characteristics which appears to be the leakage current in tristate condition but no further mention of VCC conditions for tristate. Or have I missed something.
FrankCA
Hi Frank,
The specification SCES515M states: The VCC isolation feature is designed so that if either VCC input is at GND, then both ports are in the high-impedance state. Please expand on "...either VCC input is at GND"
Datasheet implies if VCCA and/or VCCB is at GND or 0 V.
Is this a high impedance state (ie. VCC is disconnected) or is there an impedance required to GND eg. a pulldown resistor or is there a minimum current into VCC. I see mention of Ioz in the Electrical Characteristics which appears to be the leakage current in tristate condition but no further mention of VCC conditions for tristate. Or have I missed something.
This is a high impedance state highlighted below for when either Vcc is at GND, thanks.
Best Regards,
Michael.
