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PDF ST7554 Data sheet ( Hoja de datos )
| Número de pieza | ST7554 | |
| Descripción | V.90 USB WORLD MODEM CONTROLLER | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ST7554 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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ST7554
V.90 USB WORLD MODEM CONTROLLER
..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
. 0.5µm 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
SUMMARY DATA
TQFP48 (7 x 7 x 1.40mm)
(Full Plastic Quad Flat Pack)
ORDER CODE : ST7554TQF7
... 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
500µA
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+DAAchip-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.
January 1999
This is advance information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
1/11
1 page  
ST7554
PIN DESCRIPTION (continued)
3 - Reset, Powerdown (RESET, PDOWN)
RESET Pin initialises the internal counters and
control registers to their default value. A minimum
low pulse of 1ms is required to reset the chip.
In a typical application RESET is connected to
VBUS through a R, C network. This ensures that
the chip is reset at each connection / disconnection
to the USB bus (see Figure 3).
PDOWN Pin shall be connected to the powerdown
inputs of the external codec used on the SSI.
When ST7554 is in Suspend mode, PDOWN is
forced low so that the external codec is in
powerdown.
Figure 3 : RC network for RESET
VBUS
R
220kW
C
10nF
12 RESET
4 - Serial Synchronous Interface
ST7554 has a Serial Syncronous Interface (SSI)
dedicated to the connection of the STLC7550 or
ST75951, ST high performance Modem Analog
Front-End (MAFE).
4.1 - Data (DIN, DOUT)
Digital data word input/output of SSI, to be con-
nected to the data word pins of STLC7550 or
ST75951.
4.2 - Master Clock (MCLK)
This pin is the master clock output.
4.3 - Frame Synchronization (FS)
The frame synchronization is used to synchronize data
transfer between ST7554 and the external Codec.
4.4 - Hardware Control (HC1)
HC1 must be connected to the corresponding pin of
STLC7550 or ST75951, while their HC0 Pin shall be
tied to the 3.3V VREGD digital supply. This pin
selects data or control modes for the Modem Codec.
4.5 - DAA Selection (DAASEL)
Connect to VREGD when using silicon DAA chipset
based on ST75951 + ST952. Connect to DGND
when using STLC7550 with discrete interface.
5 - DAA Control Pins (IMP, DC, BUZEN,
PULSE, DISHS, RFC, LED, CLID, HO, HSDT, RI)
These pins control the World Wide software
programmable DAA through ST75951/ST952.
6 - Crystal (XTALIN, XTALOUT)
These pins must be tied to the 9.216MHz external
crystal.
It is recommended to use a ±50ppm fundamental
parallel resonator crystal. It is recommended to
insert a 1.8kΩ resistor between XTALOUT and the
crystal to limit its energy to 100µW for a 20Ω
resonator (see Figure 4).
For a SMD crystal the load capacitor is typically
CLOAD = 12pF and this leads to an ideal value of
C = 24pF for the capacitors between the crystal
and analog ground (AGND). Anyway, in practice
these capacitors shall be reduced down to
C = 18pF each by considering parasitic capacitors
on PCB and package (see Figure 4).
After a reset or when leaving the suspend state,
the 9.216MHz is asserted inside ST7554 only
3.5ms later in order to wait for it to be stable.
Figure 4 : Application schematic for the
9.216MHz external crystal
XTAL
IN
9
XTAL
OUT
10
R
1.8kW
C
18pF
C
18pF
AGND AGND
7 - PLL Output Filter (FLTPLL)
This pin must be connected to the analog ground
(AGND) through a 33pF capacitor.
8 - Reserved Pins (18 pins)
These pins must be left not connected except
Pin 47 which should be connected to the digital
ground DGND.
5/11
5 Page 
PACKAGE MECHANICAL DATA
48 PINS - THIN PLASTIC QUAD FLAT PACK (TQFP)
48
1
e
37
36
A1
0,10 mm
.004 inch
SEATING PLANE
A
A2
ST7554
12 25
13 D3 24
D1
D
c
0,25 mm
.010 inch
GAGE PLANE
K
Dimensions
A
A1
A2
B
C
D
D1
D3
e
E
E1
E3
L
L1
K
Min.
0.05
1.35
0.17
0.09
0.45
Millimeters
Typ.
1.40
0.22
9.00
7.00
5.50
0.50
9.00
7.00
5.50
0.60
1.00
Max.
1.60
0.15
1.45
0.27
0.20
Min.
0.002
0.053
0.007
0.004
0.75 0.018
0o (Min.), 7o (Max.)
Inches
Typ.
0.055
0.009
0.354
0.276
0.216
0.0197
0.354
0.276
0.216
0.024
0.039
Max.
0.063
0.006
0.057
0.011
0.008
0.030
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No licence is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems
without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics
© 1999 STMicroelectronics - All Rights Reserved
Purchase of I2C Components of STMicroelectronics, conveys a license under the Philips I2C Patent.
Rights to use these components in a I2C system, is granted provided that the system conforms to
the I2C Standard Specifications as defined by Philips.
STMicroelectronics GROUP OF COMPANIES
Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands
Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
http://www.st.com
11/11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ST7554.PDF ] | |
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