ISP1123

更新时间： 2024-09-15 22:47:59

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
49页	1057K
描述
Universal Serial Bus compound hub

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ISP1123 数据手册

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 (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 ISP1123 has built-in overcurrent sense inputs, supporting individual and ganged

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

GoodLink™ indicator outputs for easy visual monitoring of USB trafﬁc. The ISP1123

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

■ Downstream port 1 dedicated to a non-removable function, correctly reported in

the related descriptors

■ 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 global power switching for downstream ports

■ Individual or ganged 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

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与ISP1123相关器件

型号	品牌	获取价格	描述	数据表
ISP1123BD	NXP	获取价格	Universal Serial Bus compound hub
ISP1123D	NXP	获取价格	Universal Serial Bus compound hub
ISP1123NB	NXP	获取价格	Universal Serial Bus compound hub
ISP1130	NXP	获取价格	Universal Serial Bus compound hub with integrated keyboard controller
ISP1130DL	NXP	获取价格	Universal Serial Bus compound hub with integrated keyboard controller
ISP1130N	NXP	获取价格	Universal Serial Bus compound hub with integrated keyboard controller
ISP1132DL	PHILIPS	获取价格	Bus Controller, PDSO56
ISP1132DL	NXP	获取价格	IC SPECIALTY MICROPROCESSOR CIRCUIT, PDSO56, PLASTIC, SSOP-56, Microprocessor IC:Other
ISP1132N	PHILIPS	获取价格	Bus Controller, PDIP56
ISP1160	NXP	获取价格	Embedded Universal Serial Bus Host Controller

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