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USB HUB Controller – CH334/5

Overview

CH334 and CH335 are USB2.0 protocol compliant 4-port USB HUB controller chips, supporting USB2.0 high-speed and full-speed for upstream ports, and USB2.0 high-speed 480Mbps, full-speed 12Mbps and low-speed 1.5Mbps for downstream ports, supporting not only low-cost STT mode (single TT schedules 4 downstream 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 computer and industrial control machine motherboards, peripherals, embedded systems, etc.

Features

  • 4-port USB HUB controller, provides 4 downstream facing ports which comply with Universal Serial Bus Specification Revision 2.0, and backward compatible to USB Specification Revision 1.1
  • 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 tolerant 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 composite 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 compared 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
  • Provide 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 voltage to 3.3V operating power for the chip
  • 6KV enhanced ESD performance, Class 3A
  • Industrial grade temperature range: -40～85℃
  • QFN28, SOP16, QSOP28 and other small, low-cost, easy-to-process packages are available

Package

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relation files

file name file content
CH374DS1.PDF CH374 datasheet. CH374 is a USB-HOST&DEVICE general interface chip. It supports USB host and USB device, supports 12M USB full-speed communication and 1.5M low-speed communication, supports 8-bit parallel interface or SPI interface, supports all types of USB transmission and Hub operation, etc.
CH334DS1.PDF CH334/CH335 datasheet. 4-port USB2.0 high-speed HUB controller. CH334/CH335 supports high-performance MTT, and supports over-current detection and port power control. One of the downstream facing ports of CH335 supports USB3.0 SuperSpeed passthrough upstream facing port. It can be applied to computers, industrial computer motherboards, peripherals, embedded systems, etc.
CH32V20x_30xDS0.PDF Information change in the download page (Software introduction/application scope):CH32V307 is a high-capacity general-purpose microcontroller designed based on 32-bit RISC-V core, equipped with V4F core and supports single-precision floating-point instruction set for higher computing performance. It supports USB2.0 high-speed interface (480Mbps) with built-in PHY transceiver, Gigabit Ethernet MAC, etc.
CH545DS1.PDF CH545 datasheet. Multi-host multi-device enhanced E8051 MCU. The CH545 provides on-chip 4-port USB root-hub, 4-channel composite USB device controller and transceiver, and it can be used for KVM design.