标签: gl854g

       GL854G是Genesys Logic公司推出的7端口HUB扩展芯片，兼容USB 2.0协议。GL854G实现了多个负载均衡的架构来确保每个下行通道都能达到较高的传输速率。GL854G 实现了多个HUB配置参数到内部的ROM中，使得应用颗ic时候不需要在加一颗外部的EEPROM，可以节约成本。GL854G可以提供一个12MHZ的频率输出，此时钟可以用作其他应用的参考时钟。不过在应用是要注意pcb布线。QQ:1762516767 18675554078，原装现货，欢迎交流。（更多详情） GL854G的主要功能特性包括以下： · Multiple Chip Package (MCP) architecture Integrates two standard USB 4-port hub silicon dies into single chip        Supports 7 USB 2.0 compliant downstream ports  Multiple Transaction Translator (MTT)        Provides dedicated TT control logics for each downstream port        Superior performance when multiple FS devices operate concurrently  Compliant with USB specification Revision 2.0        Upstream port supports both high-speed (HS) and full-speed (FS) traffic        Downstream ports support HS, FS, and low-speed (LS) traffic        Backward compatible to USB specification Revision 1.1        Each downstream port supports status indicator, with automatic and manual modes        Conform to self power and bus power requirements  Integrated USB transceiver        Compliant with USB electrical requirements        Ultralow power consumption        Improve output drivers with slew-rate control for EMI reduction        Internal power-fail detection for ESD recovery  On-chip 8-bit micro-processor        Support customized PID, VID by reading external EEPROM        Support downstream port configuration by reading external EEPROM  Smart power management features Support individual / gang mode over-current detection for all downstream ports        Automatic switching between self-powered and bus-powered modes  Lower BOM cost        Single external 12 MHz crystal / Oscillator clock input        On-chip 5V to 3.3V power regulator        Built-in upstream port 1.5KΩ pull-up and downstream port 15KΩ pull-down resistors        Support low-cost 24C02 EEPROM  Features for hub compound applications        Support compound-device (non-removable in downstream ports) by I/O pin configuration        Provide 12MHz clock source for other USB device connected to the downstream ports  Available package type: 64 pin LQFP package (7x7mm)  Applications:        UMPC/MID, motherboard on-board applications        Consumer electronics built-in hub application        Monitor built-in hub        Embedded systems        Hub compound applications GL854G的功能框图如下：     GL854G的管脚图如下：      GL854G的采购信息如下：   (以上信息由深圳市桑尼奇科技有限公司提供)