CH334R
USB HUB Controller – CH334/5
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SKU: KL-024-0000880
Category: USB ICs
About this item
Attribute | Value |
---|---|
Manufacturer | WCH(Jiangsu Qin Heng) |
Package | QSOP16 |
TT Mode | MTT |
Operating Temperature | -40~+85℃ |
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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