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
ꢁParallel phone detect
300 bps up to 56 kbps
V.21,V.22, V.29 Fast Connect
V.42, V.42bis, MNP2-5
Automatic rate negotiation
ꢁGlobally-compliant line interface
ꢁOvercurrent detection
ꢀ 27 MHz clock input
ꢀ 3.3 V power
ꢀ 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
ꢀ Firmware upgradeable
ꢀ EEPROM interface
This data sheet is valid only for
those chipset combinations listed
on page page 70.
ꢀ Lead-free, RoHS Compliant
Packages
Applications
Pin Assignments
ꢀ Set-top boxes
ꢀ Digital video recorder
ꢀ Digital televisions
ꢀ Remote monitoring
ꢀ Point-of-sale terminals
ꢀ Text/video telephones
Si2457/34/15/04
(16-Pin Option)
Description
1
CLKIN/XTALI
XTALO
16 RTS
2
3
4
15 DCD
®
RI
VD
ESC
13 VA
14
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.
RXD
TXD
CTS
5
6
7
8
GND
INT
C1A
C2A
12
11
10
9
RESET
Si2457/34/15/04
(24-Pin Option)
24
23
22
21
20 GND
19
CLKIN/XTALI
XTALO
CLKOUT/EECS/A0
FSYNC/D6
VD3.3
1
2
3
4
5
6
7
8
SDO/EECLK/D5
DCD/D4
ESC/D3
VD3.3
VDB
SDI/EESD/D2
GND
VDA
RTS/D7
RXD/RD
TXD/WR
18
Functional Block Diagram
17 RI/D1
16
15 AOUT/INT
INT/DO
9
10
CLKIN/XTALI
XTALO
14
13
C1A
C2A
CTS/CS 11
RESET 12
PLL
CLKOUT
Clocking
RAM/ROM
Data Bus
RXD
TXD
CTS
RTS
DCD
ESC
RI
Si3018/10
QE
DCT
RX
IB
DCT2
IGND
DCT3
QB
1
2
3
4
16
15
14
13
Serial
Interface
DAA
To Phone Line
Microcontroller
DSP
Interface
C1B
C2B
VREG
RNG1
QE2
SC
VREG2
RNG2
5
6
7
12
11
10
9
INT
AOUT
ISOB
CS
WR
8
Parallel
RD
Interface
A0
D0-D7
RESET
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.