The NLSX4373 is a 2-Bit configurable dual-supply bidirectional auto sensing translator that does not require a directional control pin. The VCC I/O and VL I/O ports are designed to track two different power supply rails, VCC and VL respectively. The VCC supply rail is configurable from 1.5V to 5.5V while VL supply rail is configurable from 1.5V to 5.5V. This allows voltage logic signals on the VL side to be translated into lower, higher or equal value voltage logic signals on the VCC side and vice-versa. The NLSX4373 translator has open-drain outputs with integrated 10K Ohm pullup resistors on the I/O lines. The integrated pullup resistors are used to pullup the I/O lines to either VL or VCC. The NLSX4373 is an excellent match for open-drain applications such as the I2C communication bus.