PDIUSBH12 datasheet(2/28 Pages) PHILIPS

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Philips Semiconductors

Product specification

PDIUSBH12

USB 2-port hub

1999 Jul 22

853-2062 22025

FEATURES

• Complies with the Universal Serial Bus specification Rev. 1.0

• Complies with the ACPI, OnNOW, and USB power management

requirements

• Compliant with USB Human Interface Devices and Monitor

Control Class

• Compliant with System Management Bus Specification Rev. 1.0

• Two downstream ports with per packet connectivity and auto

speed detection

• Supports up to 3 embedded functions

• Integrated SIE (Serial Interface Engine), FIFO memory and

transceivers

• Automatic USB protocol handling

• High speed slave I2C Interface (up to 1 Mbit/s)

• Compatible with the PDIUSBH11 hardware and software

• Software controllable connection to USB bus (SoftConnect™)

• Good USB downstream connection indicators that blink with traffic

(GoodLink

™)

• Low frequency 12 MHz crystal oscillator eases EMI design issues

• Programmable output clock frequency

• Bus powered capability with very low suspend current

• Controllable LazyClock output at 30 kHz (nominal) during suspend

• Single 3.3V supply with 5V tolerant I/O

• Available in 28-pin DIP and SO packages

• Full-scan design with high fault coverage (>99%) insures high

quality

• Higher than 8 KV in-circuit ESD protection lowers cost of extra

components

DESCRIPTION

The Universal Serial Bus Hub PDIUSBH12 is a cost and feature

optimized second generation USB Hub with 2 downstream ports and

3 embedded functions (compound hub). It is normally used in any

microcontroller-based system and communicates with the system

microcontroller over the high speed I2C serial bus. This modular

approach to implementing a hub and embedded functions allows the

designer to choose the optimum system microcontroller from the

available wide variety. This flexibility cuts down the development

time, risks and costs by allowing the use of the existing architecture

and the firmware investments. This results in the fastest way to

develop the most cost-effective USB peripheral solutions that need

hub functionality. The PDIUSBH12 is ideally suited for computer

monitors, docking stations, keyboards and many other applications

that use the I2C or the SMBus based architecture.

The PDIUSBH12 conforms to the USB specification Rev 1.0, I2C

serial interface and the SMBus specifications. It is fully compliant

with the Human Interface Device Class and Monitor Control Class

specifications. Its low suspend power consumption along with the

programmable LazyClock output allows for easy implementation of

equipment that is compliant to the ACPI, OnNow and USB power

management requirements. The low operating power allows the

implementation of the bus powered or the compound powered hub

function.

The PDIUSBH12 is fully backward compatible to the first generation

PDIUSBH11 hardware and software. This allows an easy running

change in the manufacturing line to realize the cost savings. In

addition, it also incorporates the feature enhancements like

SoftConnect™, GoodLink

™, LazyClock, programmable clock output,

lower frequency crystal oscillator, additional embedded functions

and integration of termination resistors. All of these feature

enhancements contribute to significant cost savings in the system

implementation and at the same time ease the implementation of

advanced USB functionality into the peripherals.

ORDERING INFORMATION

PACKAGES

TEMPERATURE RANGE

OUTSIDE NORTH AMERICA

NORTH AMERICA

PKG. DWG. #

28-pin plastic SO

–40

°C to +85°C

PDIUSBH12 D

SOT136-1

28-pin plastic DIP

–40

°C to +85°C

PDIUSBH12 N

SOT117-1

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