Universal Serial Bus Stand-alone Hub

The ISP1122 is a stand-alone Universal Serial Bus (USB) hub device which complies with USB Specication Rev. 1.1. It integrates a Serial Interface Engine (SIE), hub repeater, hub controller, USB data transceivers and a 3.3 V voltage Regulator It has a congurable number of downstream ports, ranging from 2 to 5. The ISP1122 CAN be bus-powered, self-powered or hybrid-powered. When it is hybrid-powered the hub functions are powered by the upstream power supply (VBUS), but the downstream ports are powered by an external 5 Volt supply. The low power consumption in suspend mode allows easy design of equipment that is compliant with the ACPI, OnNow and USB Power Management requirements. The ISP1122 has built-in overcurrent sense inputs, supporting individual and global overcurrent protection for downstream ports. All ports (including the hub) have GoodLink indicator outputs for easy visual monitoring of USB trafc. The ISP1122 has a serial I 2C-bus Interface for external EEPROM access and a reduced frequency (6 MHz) crystal Oscillator These features allow signicant cost savings in system design and easy implementation of advanced USB functionality into PC peripherals. By NXP Semiconductors
ISP1122 's PackagesISP1122 's pdf datasheet

ISP1122 Pinout, Pinouts
ISP1122 pinout,Pin out
This is one package pinout of ISP1122,If you need more pinouts please download ISP1122's pdf datasheet.

ISP1122 Application circuits
ISP1122 circuits
This is one application circuit of ISP1122,If you need more circuits,please download ISP1122's pdf datasheet.

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