Philips - ISP1122

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Contents

ISP1122 UNIVERSAL SERIAL BUS Universal Serial Bus stand alone hub Rev 03 29 March 2000 Product specification BUS 1 General description The ISP1122 is a stand alone Universal Serial Bus USB hub device which complies with USB Specification 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 configurable 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 tha ...