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ISP1123D - Universal Serial Bus compound hub

General Description

The ISP1123 is a compound 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 Downstream port 1 dedicated to a non-removable function, correctly reported in the rela.

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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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ISP1123 Universal Serial Bus compound hub Rev. 01 — 5 October 1999 Preliminary specification 1. General description The ISP1123 is a compound 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, with one port dedicated to an embedded or non-removable function. The ISP1123 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.