The E-L9637D013TR with I/O Controller Interface IC ISO 9141 Interface is an integrated circuit manufactured by STMicroelectronics, which is used to implement a controller interface. This controller interface provides a standardized, low-voltage link between an automotive microcontroller, such as a powertrain control module, and an on-board diagnostic ECU. The controller interface allows data transfer between the two devices by using a physical layer to serialize and deserialize the data. The E-L9637D013TR is designed to be integrated into diagnostic equipment, in-vehicle networks, and various control systems. The integrated circuit supports the ISO-9141-2 protocol, allowing bidirectional communication of diagnostic data. It also supports baud rates up to 10.4 kbps and has a built-in flexibility to adjust the signal timing for any given application. The E-L9637D013TR comes in a 3mm x 3mm TQFP32 package and is RoHS compliant.