Overview
CH318 is a high-speed USB signal isolation and transmission distance extension control chip that supports capacitive coupling or network transformer coupling. It not only realizes the isolation of USB signals, but also realizes real-time relay and transmission distance extension of USB signals. In addition, the CH318 chip itself has a USBHUB function. The upstream port supports USB2.0 high-speed, and the downstream port supports USB2.0 high-speed 480Mbps, full-speed 12Mbps and low-speed 1.5Mbps. CH318 can be used for high-speed USB signal isolation, HUB isolation, HUB extension, etc.
Features
- The host computer mode provides 1 USB2.0 downstream port, the slave computer mode provides 2 USB2.0 downstream ports, and is backward compatible with the USB1.1 protocol specification.
- Support 480Mbps high-speed, 12Mbps full-speed and 1.5Mbps low-speed USB transfer
- Support USB control transmission, batch transmission, interrupt transmission, synchronous/isochronous transmission
- The same chip can be configured in host computer mode and slave computer mode to connect USB-Host host and USB-Device device respectively.
- With CH339 chip, it can realize the isolation of USB card reader, USB to SPI, to JTAG, to I2C and other interfaces.
- Support connection status indication
- Built-in capacitive coupling drive circuit and network transformer coupling drive circuit
- A pure hardware solution that is completely real-time and transparent to the USB protocol. It does not require the installation of any additional drivers and supports various systems that include USB interfaces.
- Provide crystal oscillator, supports external clock input, built-in PLL provides 480MHz clock for USBPHY
- The upstream port has a built-in 1.5KΩ pull-up resistor, and the downstream port has a built-in pull-down resistor required by the USB Host, simplifying the peripherals.
- USB interface pins with 6kV enhanced ESD performance, Class 3A
- Industrial-grade temperature range: -40～85℃
- Available in TSSOP20 package
Package
