SI2457 Datasheet, PDF (1/74 Pages) Silicon Laboratories – V.90, V.34, V.32BIS, V.22BIS ISOMODEM WITH GLOBAL DAA

Si2457/34/15/04
V.90, V.34, V. 32 BIS, V.22B IS I SO MO DE M® W I T H GL O B A L DAA
Features
Data modem formats
ITU-T, Bell
300 bps up to 56 kbps
V.21,V.22, V.29 Fast Connect
V.42, V.42bis, MNP2-5
Automatic rate negotiation
Type I and II caller ID decode
No external ROM or RAM required
UART or parallel interface
AT command set support
SMS / MMS support
Applications
Set-top boxes
Point-of-sale terminals
Text/video telephones
Integrated DAA
Over 6000 V Capacitive isolation
Parallel phone detect
Globally-compliant line interface
Overcurrent detection
27 MHz clock input
3.3 V power
Firmware upgradeable
EEPROM interface
Lead-free, RoHS Compliant
Packages
Digital video recorder
Digital televisions
Remote monitoring
Description
The ISOmodem^® family of products is a complete modem ranging in
speed from 56,000 bps to 2400 bps. Offered as a chipset with the Si2457,
Si2434, Si2415, or Si2404 system-side device and the Si3018/10 line-
side device, the ISOmodem utilizes Silicon Laboratories’ patented Direct
Access Arrangement (DAA) technology to provide a programmable
telephone line interface with an unparalleled level of integration. These
compact solutions eliminate the need for a separate DSP, modem
controller, codec, transformer, relay, opto-isolators, clocking crystal, and
2-4 wire hybrid. Available with a system-side packaging option of either a
16-pin SOIC or a 24-pin TSSOP, these devices are ideal for embedded
modem applications due to their flexibility, small footprint, and minimal
external component count.
Functional Block Diagram
CLKIN/XTALI
XTALO
CLKOUT
RXD
TXD
CTS
RTS
DCD
ESC
RI
INT
PLL
Clocking
Serial
Interface
RAM/ROM
Data Bus
Microcontroller
DSP
CS
WR
RD
A0
D0-D7
RESET
Parallel
Interface
DAA
Interface
To Phone Line
AOUT
ISOB
Ordering Information
This data sheet is valid only for
those chipset combinations listed
on page page 70.
Pin Assignments
Si2457/34/15/04
(16-Pin Option)
CLKIN/XTALI 1
XTALO 2
RI 3
VD 4
RXD 5
TXD 6
CTS 7
RESET 8
16 RTS
15 DCD
14 ESC
13 VA
12 GND
11 INT
10 C1A
9 C2A
Si2457/34/15/04
(24-Pin Option)
CLKIN/XTALI 1
XTALO 2
CLKOUT/EECS/A0 3
FSYNC/D6 4
VD3.3 5
GND 6
VDA 7
RTS/D7 8
RXD/RD 9
TXD/WR 10
CTS/CS 11
RESET 12
24 SDO/EECLK/D5
23 DCD/D4
22 ESC/D3
21 VD3.3
20 GND
19 VDB
18 SDI/EESD/D2
17 RI/D1
16 INT/DO
15 AOUT/INT
14 C1A
13 C2A
Si3018/10
QE ₁
16
DCT ₂
15
RX 3
14
IB 4
13
C1B 5
12
C2B 6
11
VREG 7
10
RNG1 8
9
DCT2
IGND
DCT3
QB
QE2
SC
VREG2
RNG2
Rev. 1.0 2/05
Copyright © 2005 by Silicon Laboratories
Si2457/34/15/04
This information applies to a product under development. Its characteristics and specifications are subject to change without notice.