I have used uja1135 (3V version) in my design. I have not programmed my MCU yet, but the reset pin of the SBC oscillates and don't go to logic 1 (shown in attached pictures). The on-time of reset pin is less than 1 us and the period is around 125 us. I have both 3.3V and 5V in my system. I have 20 boards and all are the same. Has anyone had this problem before?