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ISP1123BD

Universal Serial Bus compound hub

Philips Electronics 

Philips Semiconductors

ISP1123

USB compound hub

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

s Operating temperature range −40 to +85 °C

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

s Full-scan design with high test coverage

s Available in 32-pin SDIP, SO and LQFP packages.

3. Ordering information

Table 1: Ordering information

Type number

Package

Name

Description

ISP1123D

SO32

plastic small outline package; 32 leads; body width 7.5 mm

ISP1123NB

SDIP32

plastic shrink dual in-line package; 32 leads (400 mil)

ISP1123BD [1]

LQFP32 plastic low profile quad flat package; 32 leads; body 7 x 7 x 1.4 mm

[1] For the availability of the LQFP32 package please contact your local Philips Semiconductors sales office.

4. Block diagram

Version

SOT287-1

SOT232-1

SOT358-1

ISP1123

VCC Vreg(3.3)

5V

SUPPLY

REGULATOR

3.3 V

upstream

port

D+ D−

LED

ANALOG

Tx / Rx

HUB

GoodLink

full

speed

6 MHz

PLL

BIT CLOCK

RECOVERY

PHILIPS

SIE

PACKET

GENERATOR

I2C-BUS

INTERFACE

INDV

HUB

CONTROLLER OPTION

SDA

SCL

HUB

REPEATER

END OF

FRAME

TIMERS

GENERAL

PORT

CONTROLLER

ANALOG

Tx /Rx

GoodLink/

POWER SWITCH/

OC DETECT

ANALOG

Tx/ Rx

GoodLink/

POWER SWITCH/

OC DETECT

ANALOG

Tx/ Rx

GoodLink/

POWER SWITCH/

OC DETECT

ANALOG

Tx / Rx

GoodLink/

POWER SWITCH/

OC DETECT

ANALOG

Tx / Rx

GoodLink/

POWER SWITCH/

OC DETECT

self/bus

powered

D+ D− overcurrent LED/ D+ D− overcurrent LED/ D+ D− overcurrent LED/ D+ D− overcurrent LED/ D+ D− overcurrent LED/

detection power switch

detection power switch

detection power switch

detection power switch

detection power switch

downstream port 1:

embedded or non-removable

function

downstream port 2

(removable)

downstream port 3

(removable)

downstream port 4

(removable)

downstream port 5

(removable)

MBL083

This is a conceptual block diagram and does not include each individual signal.

Fig 1. Block diagram of the ISP1123.

9397 750 06325

Preliminary specification

Rev. 01 — 5 October 1999

© Philips Electronics N.V. 1999. All rights reserved.

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