I want to use UART-RS485 converter circuit as in the attachment. The circuit is working when I use ADM483-EAR Transceiver for U1. It can provide communication even with 3.3V. However the circuit is not working when I use ISL83078EIBZ for U1. I observe enable and tx signal is fine and same as in ADM483-EAR. But there is no communication. I mean it transmit but not receive. Why does not the circuit work with ISL83078EIBZ? Why does it work with ADM483-EAR?