Si2456/Si2433/Si2414
V.90, V. 34, V. 32
B I S
I S O
M O D E M
™
Features
Data modem formats
ITU-T, Bell
300 bps up to 56 kbps
V.42, V.42bis, MNP2-5
Automatic rate negotiation
WITH
I
N T E G R A T E D
G
L O B A L
DAA
Integrated DAA
Capacitive isolation
Parallel phone detect
Globally-compliant line interface
Overcurrent detection
Caller ID decode
3.3 V power
No external ROM or RAM required
UART with flow control
AT command set support
Fast connect
Parallel interface
Call progress support
Firmware upgradeable
Ordering Information
This data sheet is valid only for
those chipset combinations listed
on page 81.
Applications
Set-top boxes
Email terminals
Point-of-sale terminals
PVRs
Security systems
Remote monitoring
Pin Assignments
Si2456/33/14
CLKIN/XTALI
XTALO
CLKOUT/A0
D6
VD3.3
GND
VDA
RTS/D7
RXD/RD
TXD/WR
CTS/CS
RESET
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
D5
DCD/D4
ESC/D3
C1A
ISOB
VD3.3
GND
VDB
D2
RI/D1
INT/D0
AOUT/INT
Description
The Si2456 is a complete, ITU-V.90-compliant, 56 kbps modem chipset
with integrated direct access arrangement (DAA) that provides a
programmable line interface to meet global telephone line requirements
with a single design. Available in two small packages, it eliminates the
need for a separate DSP data pump, external RAM and ROM, modem
controller, analog front end (AFE), isolation transformer, relays, opto-
isolators, and 2- to 4-wire hybrid. The ISOmodem™ is ideal for embedded
modem applications due to its small board space, low power
consumption, and global compliance. The Si2433 and Si2414 products
offer all the same features as the Si2456 with connect rates of up to
33.6 kbps and 14.4 kbps, respectively.
Functional Block Diagram
QE2
DCT
CLKIN/XTALI
CLKOUT
RXD
TXD
CTS
RTS
DCD
ESC
RI
INT
CS
WR
RD
A0
D0-D7
RESET
PLL
Clocking
XTALO
Si3015
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
FILT2
FILT
RX
REXT
REXT2
REF
VREG2
VREG
IGND
RAM
Data Bus
C1B
RNG1
RNG2
QB
DAA
Interface
Si3015
C1A
Serial
Interface
QE
To Phone
Line
Microcontroller
DSP
AOUT
Parallel
Interface
ISOB
Patents pending
Rev. 0.9 9/02
Copyright © 2002 by Silicon Laboratories
Si2456/Si2433/Si2414-DS09
SILABS [ SILICON LABORATORIES ]
