The GX76472 is a low-power, high-performance, quad-channel linear driver chip. It is designed for 400G/600G optical integrated transmitter small-form factor (SFF) modules for metro and long-haul applications. The GX76472 integrated quad lanes of driver with SPI circuitry for DC controls on a single die. Each channel of driver has 100Ω differential AC-coupled input and 100Ω differential interface with a back terminated output stage to allow external AC-coupled interface with optical modulator, and linear output voltage of 4.0Vppd suitable for LiNbO3 multi-level modulations.