ISP1122

更新时间： 2024-11-05 22:05:11

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
48页	1054K
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Universal Serial Bus stand-alone hub

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ISP1122 数据手册

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 (V_BUS),

but the downstream ports are powered by an external 5 Volt supply. The low power

consumption in ‘suspend’ mode allows easy design of equipment that is compliant

with the ACPI™, OnNow™ and USB power management requirements.

The ISP1122 has built-in overcurrent sense inputs, supporting individual and global

overcurrent protection for downstream ports. All ports (including the hub) have

GoodLink™ indicator outputs for easy visual monitoring of USB trafﬁc. The ISP1122

has a serial I²C-bus interface for external EEPROM access and a reduced frequency

(6 MHz) crystal oscillator. These features allow signiﬁcant cost savings in system

design and easy implementation of advanced USB functionality into PC peripherals.

2. Features

■ High performance USB hub device with integrated hub repeater, hub controller,

Serial Interface Engine (SIE), data transceivers and 3.3 V voltage regulator

■ Complies with Universal Serial Bus Speciﬁcation Rev. 1.1 and ACPI, OnNow and

USB power management requirements

■ Conﬁgurable from 2 to 5 downstream ports with automatic speed detection

■ Internal power-on reset and low voltage reset circuit

■ Supports bus-powered, hybrid-powered and self-powered application

■ Individual or ganged power switching for downstream ports

■ Individual or global port overcurrent protection with built-in sense circuits

■ 6 MHz crystal oscillator with on-chip PLL for low EMI

■ Visual USB trafﬁc monitoring (GoodLink™) for hub and downstream ports

■ I²C-bus interface to read vendor ID, product ID and conﬁguration bits from

external EEPROM

■ Operation over the extended USB bus voltage range (4.0 to 5.5 V)

■ Operating temperature range −40 to +85 °C

■ 8 kV in-circuit ESD protection for lower cost of external components

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与ISP1122相关器件

型号	品牌	获取价格	描述	数据表
ISP1122A	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1122ABD	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1122AD	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1122ANB	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1122BD	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1122D	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1122NB	NXP	获取价格	Universal Serial Bus stand-alone hub
ISP1123	NXP	获取价格	Universal Serial Bus compound hub
ISP1123BD	NXP	获取价格	Universal Serial Bus compound hub
ISP1123D	NXP	获取价格	Universal Serial Bus compound hub

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