參數(shù)資料
型號(hào)： ISP1122A
廠商： NXP Semiconductors N.V.
英文描述： Universal Serial Bus stand-alone hub
中文描述： 通用串行總線獨(dú)立的樞紐
文件頁(yè)數(shù)： 1/48頁(yè)
文件大?。?/td> 1150K
代理商： ISP1122A
ISP1122A
Universal Serial Bus stand-alone hub
Rev. 01 — 27 March 2000
Preliminary specification
c
c
1.
General description
The ISP1122A 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 ISP1122A 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 ISP1122A 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 ISP1122A
has a serial I
2
C-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
I
High performance USB hub device with integrated hub repeater, hub controller,
Serial Interface Engine (SIE), data transceivers and 3.3 V voltage regulator
I
Complies with Universal Serial Bus Specification Rev. 1.1and ACPI, OnNow and
USB power management requirements
I
Configurable from 2 to 5 downstream ports with automatic speed detection
I
Internal power-on reset and low voltage reset circuit
I
Supports bus-powered, hybrid-powered and self-powered application
I
Individual or ganged power switching for downstream ports
I
Individual or global port overcurrent protection with built-in sense circuits
I
6 MHz crystal oscillator with on-chip PLL for low EMI
I
Visual USB traffic monitoring (GoodLink) for hub and downstream ports
I
I
2
C-bus interface to read vendor ID, product ID and configuration bits from
external EEPROM
I
Operation over the extended USB bus voltage range (4.0 to 5.5 V)
I
Operating temperature range
40 to
+
85
°
C
I
8 kV in-circuit ESD protection for lower cost of external components
相關(guān)PDF資料
PDF描述
ISP1122ABD Universal Serial Bus stand-alone hub
ISP1122AD Universal Serial Bus stand-alone hub
ISP1122ANB Universal Serial Bus stand-alone hub
ISP1122 Universal Serial Bus stand-alone hub
ISP1122BD Universal Serial Bus stand-alone hub
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ISP1122ABD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
ISP1122AD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
ISP1122ANB 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
ISP1122BD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
ISP1122D 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Universal Serial Bus stand-alone hub
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