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MFG:QFP  Package Cooled:PHILIPS  D/C:O2  

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Part Number: ISP1122A

 

MFG: QFP

Package Cooled: PHILIPS

D/C: O2

Description: The ISP1122A is a stand-alone Universal Serial Bus (USB) hub device which complies with USB Specificat...


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ISP1122A 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 (VBUS), 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 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.

ISP1122A Maximum Ratings

Symbol Parameter Conditions Min Max Unit
VCC supply voltage -0.5 +6.0 V
VI input voltage -0.5 VCC+0.5 V
Ilatchup latch-up current VI < 0 or VI > VCC - 200 mA
Vesd electrostatic discharge voltage ILI < 15 A [1][2] - ±4000[3] V
Tstg storage temperature -60 +150
Ptot total power dissipation - 95 mW
[1] Equivalent to discharging a 100 pF capacitor via a 1.5 k resistor (Human Body Model).
[2] Values are given for device only; in-circuit Vesd(max) = ±8000 V.
[3] For open-drain pins Vesd(max) = ±2000 V.

ISP1122A 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
 ·   Full-scan design with high test coverage
 ·   Available in 32-pin SDIP, SO and LQFP packages

ISP1122A Connection Diagram

ISP1122A Connection Diagram

ISP1122A datasheet

ISP1122A
PDF/DataSheet Download

  • Datasheet: ISP1122A
  • File Size: 1177871 KB
  • Manufacturer: PHILIPS [Philips Semiconductors]
  • Click here to Download

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