TLE9015DQU iso UART Transceiver IC Infineon Technologies TLE9015DQU iso UART Transceiver IC is intended for connecting several TLE9012DQU devices in a daisy chain inside a Li-Ion battery. The device's two UART and iso UART interface pairs allow support ring communication and improve the system's availability at a low cost. The Infineon TLE9015DQU IC enables bidirectional information flow by including an error management unit including several inputs and outputs that are programmable on each TLE9012DQU.