CH334 Datasheet | Unknown Manufacturer

Overview CH334 and CH335 are USB2.0 protocol pliant 4-port USB HUB controller chips, supporting USB2.0 highspeed and full-speed for uplink ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and low-speed 1.5Mbps for downlink ports, supporting not only low-cost STT mode (single TT schedules 4 downlink ports in time share), but also supports high performance MTT mode (4 TTs each corresponding to 1 port, concurrent processing). Industrial grade design with streamlined peripherals for use in puter and industrial control machine motherboards, peripherals, embedded systems, etc. Features - 4-port USB HUB, providing 4 USB 2.0 downlink ports, backward patible with USB 1.1 protocol specification - Support each port independent power control or GANG overall linkage power control - Support independent overcurrent detection of each port or overall overcurrent detection of GANG, support 5V withstand overcurrent signal input - Support high performance MTT mode, providing independent TT for each port to achieve full bandwidth concurrent transmission, with 4 times the total bandwidth of STT - Support port status LED indicators - Configurable via external EEPROM to support posite devices, non-removable devices, custom VIDs, PIDs and port configurations - Built-in information memory, for industry-specific needs can be customized in bulk manufacturer or product information and configuration - Self-developed dedicated USB PHY, low-power consumption technology, significantly reduced pared to the first generation of HUB chips, support self-powered or bus-powered - Self-powered or bus-powered mode configurable via I/O pins or external EEPROM - Provides crystal oscillator with built-in capacitor, supports external 12MHz input, and built-in PLL provides 480MHz clock for USB PHY - Built-in 1.5KΩ pull-up resistor on the uplink port, built-in pull-down resistor on the downlink port required for USB Host, streamlined periphery - Built-in LDO linear buck regulator converts USB bus supply...