Arrival Electronics would like to introduce the GL854 7 port USB hub controller from Genesys Logic

Genesys_logo_???The GL854G  is Genesys Logic’s  premium  7-port  hub solution which fully complies with Universal Serial Bus Specification Revision 2.0.    The GL854G  implements a multiple TT architecture that provides dedicated TT  to  each downstream  (DS)  port,  which  guarantees  Full-Speed(FS)  data passing bandwidth when multiple FS device perform heavy loading operations. The controller  inherits Genesys Logic’s cutting edge technology on cost and power efficient serial interface design. The GL854G has proven compatibility, lower power consumption figures and better cost structure above all USB 2.0 hub solutions worldwide.

The GL854G implements multiple hub configuration features onto an internal mask ROM,  which traditionally requires  an external EEPROM.  The microprocessor  detects  general purpose I/O (GPIO)  status during the  initial stage to configure hub settings  such as  (1)  declaration of compound  device (2)  gang/individual mode selection…etc.    The external EEPROM can be removed if no vendor specified PID/VID or product string  is required for the application.

The GL854G  provides a 12MHz clock output that can be used as a reference clock source for multi-chip, hub compound  applications. The output clock provides enough driving capacity to support up to 2 devices connected to the downstream port

A lower bom cost can be achieved as the GL854 uses a single external 12 MHz crystal / Oscillator clock input, has an  On-chip 5V to 3.3V power regulator, with built-in upstream port 1.5K? pull-up and downstream port 15K? pull-down resistors, and supports a low-cost 24C02 EEPROM.

The GL854 is available in a 64 pin LQFP package (7x7mm). Typical applications include,  UMPC/MID, motherboard on-board applications, consumer electronics, monitor built-in hub and embedded systems.