CH9445F is a super-high-speed bidirectional 4x6 and low-speed 2x2 crossover ana-log switch chip that supports USB 3.1 Gen2 super-high-speed signals and DP 1.4 high-speed signals. It can not only configure routing switches for 2ch/4ch DP channels and USB 3.0/3.1, but also provide crossover MUX for low-speed communication.
CH9445F is suitable for applications such as Type-C to DP/HDMI/USB3.1. It has I2C control for configuring multi-channel MUX switching and provides four GPIO pins. The GPIO control register can independently control the four GPIOs and support GPIO interrupt function. When CH9445F is used for the computer Type-C interface, it can receive the control signal sent by EC through I2C, and realize USB 3.1 data transmission, Alt Mode audio and video output and other functions by switching RX/TX.
CH9445F can be used in computer Type-C port to achieve mode 1: Type-C four pairs of differential signals are all derived from CPU USB Controller, and USB 3.1 Gen2 ultra-high-speed signals can be realized at this time; Mode 2: Type-C four pairs of differential signals are all derived from GPU DisplayPort, and the four-wire Alt Mode audio and video output function can be realized at this time; Mode 3: Full-function Type-C four pairs of differential signals are derived from CPU USB Controller and GPU DisplayPort respectively, and USB 3.0 and two-wire Alt Mode audio and video output functions can be realized at this time.
Chip features:
4:4 or 4:6 cross-channel ultra-high-speed differential signal MUX switch.
Support USB 3.1 Gen2 ultra-high-speed signals.
Support DP1.4 high-speed signals.
Provide cross-switch circuits for CSBU and SBU pins.
Control and configure multi-way MUX switching through I2C two-wire interface.
Provide 4 GPIO pins and support pin interrupt function.
Support low power mode.
Available in QFN32-4x4mm package.
