Other Parts Discussed in Thread: SN74AVC4T245
Hello,
I am seeing some weird issues with SN74AVCH4T245PWR. I am using this device as shown in the illustration below where the right side is a common shared line on a backplane with 16 cards. When I have one card it works great but when I insert another and don't drive the lines at the same time I see the tristated state getting squished from a 3.3V pull up (Not shown in figure below) to 1V. I think this maybe related to the bus hold feature. Will this work as a replacement? SN74AVC4T245PWR
Signal CONT1_CARDSTATUS_ENA enables the bus when commanded by a common controller and otherwise I expect the 3 lines to be tristated. A pull up at the other end understands it as logic 1 when not commanded. When we want to drive a status we drive a 0.
