The DIO1553WL9 with Signal Switches, Multiplexers, Decoders WLCSP-9 RoHS is an electronic part manufactured by Dioo. It is a single channel digital input/output signal switch with one input and output line, each with their own pull-up resistor and pull-down resistor. The input and output signals are TTL/30V compatible and can be used as an analog switch for controlling the signal switching between the two elements in a system. The part also includes a multiplexer, a decoder, and low current consumption feature, making it suitable for applications with reduced power supply voltage. Additionally, the part is compliant with the RoHS directive and is packaged in a Wafer Level Chip Scale Package (WLCSP-9), significantly reducing its size.