Si2457/34/15/04
®
V.90, V.34, V.32BIS, V.22BIS ISOMODEM WITH GLOBAL DAA
Features
ꢀ Data modem formats
ꢀ Integrated DAA
ꢁ
ꢁ
ꢁ
ꢁ
ꢁ
ITU-T, Bell
ꢁOver 6000 V Capacitive isolation
300 bps up to 56 kbps
V.21,V.22, V.29 Fast Connect
V.42, V.42bis, MNP2-5
Automatic rate negotiation
ꢁParallel phone detect
ꢁGlobally-compliant line interface
ꢁOvercurrent detection
ꢀ 27 MHz clock input
ꢀ Single 3.3 V power supply
ꢀ Firmware upgradeable
ꢀ EEPROM interface
ꢀ Type I and II caller ID decode
ꢀ No external ROM or RAM required
ꢀ UART or parallel interface
ꢀ AT command set support
ꢀ SMS / MMS support
Ordering Information
This data sheet is valid only for
those chipset combinations listed
on page 70.
ꢀ Pb-free, RoHS Compliant
Packages
ꢀ Commercial or industrial
temperature range
Pin Assignments
Applications
ꢀ Set-top boxes
ꢀ Point-of-sale terminals
ꢀ Text/video telephones
ꢀ Digital video recorder
ꢀ Digital televisions
ꢀ Remote monitoring
Si2457/34/15/04
(16-Pin Option)
1
2
3
4
CLKIN/XTALI
XTALO
16 RTS
15 DCD
RI
VD
ESC
14
13 VA
Description
RXD
TXD
5
6
7
8
GND
12
11
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.
INT
CTS
10
9
C1A
C2A
RESET
Si2457/34/15/04
(24-Pin Option)
24
23
22
21
CLKIN/XTALI
XTALO
1
2
3
4
5
6
7
8
SDO/EECLK/D5
DCD/D4
CLKOUT/EECS/A0
FSYNC/D6
VD3.3
ESC/D3
VD3.3
20 GND
19
18
VDB
GND
VDA
SDI/EESD/D2
RTS/D7
17 RI/D1
16
15 AOUT/INT
Functional Block Diagram
INT/DO
RXD/RD
TXD/WR
9
10
14
13
C1A
C2A
CTS/CS 11
RESET 12
CLKIN/XTALI
XTALO
PLL
Clocking
CLKOUT
RAM/ROM
Data Bus
Si3018/10
RXD
TXD
CTS
RTS
DCD
ESC
RI
QE
DCT2
IGND
1
2
3
4
16
DCT
15
Serial
Interface
RX
IB
DCT3
QB
14
13
DAA
Interface
To Phone Line
C1B
C2B
QE2
5
6
7
12
11
Microcontroller
DSP
SC
INT
VREG
RNG1
10
9
VREG2
RNG2
AOUT
ISOB
CS
WR
RD
8
Parallel
Interface
A0
D0-D7
RESET
Rev. 1.1 8/06
Copyright © 2006 by Silicon Laboratories
Si2457/34/15/04