HLMP-EG3G-VX0DD is a Broadcom opto-isolator IC, specifically a High-Speed Single-Channel Digital Optocoupler. It has a gallium arsenide infrared LED, a Silicon NPN phototransistor detector, and internal signal shaping circuitry. The maximum operating temperature is +85°C, and its isolation voltage is 5000VRMS. It has a maximum propagation delay of 55ns, and its output is an open-collector structure.