1/18

October 2000

HARDWARE FEATURES

S/T ISDN Interface

MANCE WITH UIT-T I.430 FOR BASIC

ACCESS AT S AND T INTERFACES

(ETSI

300012/ANSI T1.605)

DRIVE

ON SEPARATE TRANSMIT AND RECEIVE

TWISTED PAIRS USING ALTERNATE MARK

INVERSION (AMI) LINE CODING

CHANNEL AT 16KBps

I.430

WIRING

CONFIGURATIONS

SUPPORTED INCLUDING PASSIVE BUS

FOR TE’S DISTRIBUTED POINT TO POINT

AND POINT TO MULTIPOINT

PART:

INCLUDED

WITH

ADAPTIVE DETECTION THRESHOLD AND

EQUALIZER

USB Interface

ANCE,

1.1

SPECIFICATION

COMPATI-

BILITY (1.1 POWER MANAGEMENT COM-

PLIANCE), 12 MBps FULL SPEED

USB

TRANSCEIVER

WITH

DIGITAL PLL

B2,

D

CHANNELS

DATA.INTERRUPT

ENDPOINT FOR I430

ENDPOINT FOR USB STANDARD PLUS

VENDOR SPECIFIC REQUEST

VENDOR REQUESTS

(PIN PROGRAMMABLE)

SUSPEND MODE COMPLIANCE

USB DEVICE REGISTRATION, WAKE-UP

CAPABILITY, USB DEVICE IDENTIFICATION

GENERAL

– USB hot plug and play interface.

– Control access and interrupt handling provided

through the USB interface.

– All FIFOS and FIFOS management needed in-

cluded for USB/ISDN data processing.

– Internal PLL to generate the USB 48MHz clock

from a 15.36MHz crystal.

– Internal regulator for 3.3V generation from USB

bus 5V.

– 48 pin TQFP package.

– 0.35 micron HCMOS 6 process.

DESCRIPTION

ST5481 combines ISDN link access and an USB

interface to allow a very simple USB/ISDN

modem design with all ISDN protocols and upper

applications processed into the HOST PC.

TQFP48

ORDERING NUMBER:

ST5481 TQF7

ST5481

PRODUCT PREVIEW

L.O.U.I.S - LOW COST USB ISDN SOLUTION

This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.