ST7554

V.90 USB WORLD MODEM CONTROLLER

January 1999

SUMMARY DATA

TQFP48 (7 x 7 x 1.40mm)

(Full Plastic Quad Flat Pack)

ORDER CODE : ST7554TQF7

GENERAL

.

USB HOT PLUG & PLAY INTERFACE

.

DIRECT INTERFACE TO ST MAFE+DAA

CHIP-SET ST75951/ST952 FOR WORLD-

WIDE DAA DESIGN OR TO STLC7550 FOR

TRADITIONAL DAA DESIGN

.

WINDOWS

® 98 AND NT 5.0 SUPPORT

.

TAPI 2.0 COMPLIANT

.

SOFTWARE UPGRADABLE

.

MINIMUM SYSTEM REQUIREMENTS:

.

USB MOTHERBOARD, 166MHz PENTIUM

®

PROCESSOR WITH MMX

™ TECHNOLOGY,

WINDOWS

® 98 AND 16MBYTES RAM OR

WINDOWS

® NT 5.0 AND 32MBYTES RAM

DEVICE FEATURES

.

SINGLE 9.216MHz CRYSTAL OSCILLATOR

.

INTEGRATED ANALOG AND DIGITAL 3.3V

REGULATORS

.

DEDICATED PINS FOR RING, OFF-HOOK,

CLID, LOOP CURRENT SENSE

.

0.5

µm CMOS PROCESS

.

TQFP48 (7 x 7 mm) PACKAGE

DATA MODEM / FAX / VOICE

.

V.90

.

V.34BIS, V.34, V.32BIS, V.32, V.22BIS, V.22,

V.23, V.21

.

BELL 103 AND BELL 212A

.

V.17, V.27TER, V.29, FAX CLASS 1 SUPPORT

.

V.42, V.42BIS, MNP 2, 3, 4, 5

.

V.80

.

V.8 AND AUTO MODE

.

VOICE / FAX / MODEM DISTINCTION

.

ADPCM

VOICE

COMPRESSION/DECOM-

PRESSION

.

VOICE DETECTION (SILENCE DETECTION)

OTHER FEATURES

.

VIRTUAL UART (460.8Kbps)

.

AT HAYES COMMAND COMPATIBLE

.

TIME INDEPENDENT ESCAPE SEQUENCE

(TIES) COMMAND

.

CALLER ID

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

.

DTMF DETECTION AND GENERATION

.

WAKE UP ON RING

.

WORLD-WIDE PROGRAMMABLE SILICON

DAA

SUPPORT

FOR

ST75951/ST952

MAFE+DAA CHIP-SET

UNIVERSAL SERIAL BUS

.

SPECIFICATION 1.0, 12MBps FULL SPEED

.

ON-CHIP USB TRANSCEIVER WITH DIGITAL PLL

.

COMMUNICATION

DEVICE

CLASS

AND

VENDOR REQUESTS

.

BUS OR SELF POWERED APPLICATION

(PIN-PROGRAMMABLE)

.

ONNOW POWER MANAGEMENT (D0, D2, D3)

.

LOW POWER CONSUMPTION (SUSPEND

MODE D2), WHOLE APPLICATION BELOW

500

µA

DESCRIPTION

The ST7554 is a single chip host signal processing

Modem/fax/voice controller that supports data rates

up to 56Kbps. All data pump and protocol functions

are executed on the host PC’s processor. This

product has been developed in cooperation with

Smart Link Ltd, who ported "USB-Modio", its host

based Modem and system software into ST system

and hardware platform. The ST7554 directly con-

nects to ST high performance Modem analog front-

end (MAFE) STLC7550 or to the highly integrated

MAFE+DAA chip-set ST75951/ST952. The ST7554

also features an Universal Serial Bus (USB) inter-

face for direct connection to the host PC for maxi-

mum flexibility and real plug & play operation.

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