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ISP1122BD - Universal Serial Bus stand-alone hub

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.

Key Features

  • allow significant cost savings in system design and easy implementation of advanced USB functionality into PC peripherals. 2. Features c c s High performance USB hub device with integrated hub repeater, hub controller, Serial Interface Engine (SIE), data transceivers and 3.3 V voltage regulator s Complies with Universal Serial Bus Specification Rev. 1.1 and ACPI, OnNow and USB power management requirements s Configurable from 2 to 5 downstream ports with automatic speed detection s Internal power.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ISP1122 Universal Serial Bus stand-alone hub Rev. 03 — 29 March 2000 Product specification 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.