Philips ISP1520 User Manual Page 1

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ISP1520
Hi-Speed Universal Serial Bus hub controller
Rev. 03 — 24 November 2004 Product data
1. General description
The ISP1520 is a stand-alone Universal Serial Bus (USB) hub controller IC that
complies with
Universal Serial Bus Specification Rev. 2.0
. It supports data transfer at
high-speed (480 Mbit/s), full-speed (12 Mbit/s) and low-speed (1.5 Mbit/s).
The upstream facing port can be connected to a Hi-Speed USB host or hub or to an
Original USB host or hub. If the upstream facing port is connected to a Hi-Speed USB
host or hub, then the ISP1520 will operate as a Hi-Speed USB hub. That is, it will
support high-speed, full-speed and low-speed devices connected to its downstream
facing ports. If the upstream facing port is connected to an Original USB host or hub,
then the ISP1520 will operate as an Original USB hub. That is, high-speed devices
that are connected to its downstream facing ports will operate in full-speed mode
instead.
The ISP1520 is a full hardware USB hub controller. All Original USB devices
connected to the downstream facing ports are handled using a single Transaction
Translator (TT), when operating in a cross-version environment. This allows the
whole 480 Mbit/s upstream bandwidth to be shared by all the Original USB devices
on its downstream facing ports.
The ISP1520 has four downstream facing ports. If not used, ports 3 and 4 can be
disabled. The vendor ID, product ID and string descriptors on the hub are supplied by
the internal ROM; they can also be supplied by an external I
2
C-bus™ EEPROM or a
microcontroller.
The ISP1520 IC is suitable for self-powered hub designs.
An analog overcurrent detection circuitry is built into the ISP1520, which can also
accept digital overcurrent signals from external circuits; for example, Micrel MOSFET
switch MIC2026. The circuitry can be configured to trip on a global or an individual
overcurrent condition.
Each port comes with two status indicator LEDs.
Target applications of the ISP1520 are monitor hubs, docking stations for notebooks,
internal USB hub for motherboards, hub for extending Intel
®
Easy PCs, hub boxes,
and so on.
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Summary of Contents

Page 1 - 1. General description

ISP1520Hi-Speed Universal Serial Bus hub controllerRev. 03 — 24 November 2004 Product data1. General descriptionThe ISP1520 is a stand-alone Universal

Page 2 - 3. Applications

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Page 3 - 5. Ordering information

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Page 4 - 6. Block diagram

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Page 5 - 7. Pinning information

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Page 9 - 8. Functional description

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Page 12 - 9. Configuration selections

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Page 13 - • Overcurrent sense device

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Page 18 - …continued

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Page 26 - 12. Hub requests

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Page 27 - 12.2 Hub class requests

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Page 32 - 13. Limiting values

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Page 33 - 15. Static characteristics

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Page 36 - 16. Dynamic characteristics

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Page 44 - 3.3 V or 5.0 V

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Page 45

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Page 46 - 19. Package outline

9397 750 13701Philips SemiconductorsISP1520Hi-Speed USB hub controller© Koninklijke Philips Electronics N.V. 2004. All rights reserved.Product data Re

Page 47 - 20. Soldering

© Koninklijke Philips Electronics N.V. 2004.Printed in The NetherlandsAll rights are reserved. Reproduction in whole or in part is prohibited without

Page 48 - 20.4 Manual soldering

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Page 49 - 21. Revision history

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Page 50

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Page 51 - Contents

Philips SemiconductorsISP1520Hi-Speed USB hub controllerProduct data Rev. 03 — 24 November 2004 9 of 519397 750 13701© Koninklijke Philips Electronics

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