ISP1521

更新时间： 2024-10-27 21:54:51

品牌	Logo	应用领域
恩智浦 - NXP		控制器
页数	文件大小	规格书
53页	259K
描述
Hi-Speed Universal Serial Bus hub controller

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ISP1521 数据手册

ISP1521

Hi-Speed Universal Serial Bus hub controller

Rev. 03 — 24 November 2004

Product data

1. General description

The ISP1521 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 ISP1521 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 ISP1521 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 ISP1521 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 ISP1521 has seven downstream facing ports. If not used, ports 3 to 7 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 I²C-bus™ EEPROM or a

microcontroller.

The ISP1521 is suitable for self-powered hub designs.

An analog overcurrent detection circuitry is built into the ISP1521, 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 ISP1521 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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型号	品牌	获取价格	描述	数据表
ISP1521BE	NXP	获取价格	Hi-Speed Universal Serial Bus hub controller
ISP1561	NXP	获取价格	ISP1561BM
ISP1561BM	NXP	获取价格	ISP1561BM
ISP1561BM,518	NXP	获取价格	IC UNIVERSAL SERIAL BUS CONTROLLER, PQFP128, 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026,
ISP1561BM,551	NXP	获取价格	IC UNIVERSAL SERIAL BUS CONTROLLER, PQFP128, 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026,
ISP1562	NXP	获取价格	Hi-Speed Universal Serial Bus PCI Host Controller
ISP1562BE	NXP	获取价格	Hi-Speed Universal Serial Bus PCI Host Controller
ISP1562BE,518	NXP	获取价格	IC UNIVERSAL SERIAL BUS CONTROLLER, PQFP100, 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026,
ISP1562BE,551	NXP	获取价格	USB Bus Controller, CMOS, PQFP100, 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT-407-1,
ISP1563	NXP	获取价格	Hi-Speed Universal Serial Bus PCI Host Controller