Other Parts Discussed in Thread: SN74LVC1G125, SN74LVC1G17
Hi,
Good day. I hope everything is fine.
Our customer is using the SN74LVC1T45 and they notice a glitch on output A when 1.8V VCCA rises while the 5.0V VCCB is not applied even though output is pulled down with 20K resistor. We have suggested to put a lower value resistor and they did. They use a 4.7K and then a 1K pull-down and they did mitigate the glitch, the former left a bit more than the latter as you would expect.
With this, they want to know, will this technology always have a glitch when powering up? They thought the outputs would be high impedance when one or both of the supplies were not present.
Kindly refer to the attached image for the said behavior of the output. SN74LVC1T45_Glitch.zip
I would appreciate your help on this matter. Thank you and have a great day.
Regards,
Cedrick