Specifications

Rev. 1.3 12/10 Copyright © 2010 by Silicon Laboratories Si2493
Ordering Information
This data sheet is valid only for
those chipset combinations listed
on page 51.
Pin Assignments
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Si2493
(24-Pin Option)
CLKIN/XTALI
XTALO
CLKOUT/EECS/A0
FSYNC/D6
VD3.3
GND
VDA
SS/RTS/D7
MISO/RXD/RD
MOSI/TXD/WR
SCLK/CTS/CS
RESET
AOUT/INT
RI/D1
SDI/EESD/D2
VDB
VD3.3
ESC/D3
DCD/D4
GND
SDO/EECLK/D5
INT/DO
C1A
C2A
QE
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
DCT
RX
IB
C1B
C2B
VREG
RNG1
RNG2
VREG2
SC
QE2
QB
DCT3
IGND
DCT2
1
Si3018
CLKIN/XTALI
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
XTALO
RI
V
D
MISO/RXD
MOSI/TXD
SCLK/CTS
RESET
C2A
C1A
INT
GND
V
A
ESC
DCD
SS/RTS
1
Si2493
(16-Pin Option)
Si2493
V.92 ISOMODEM
®
WITH GLOBAL DAA
Features
Applications
Description
The Si2493 ISOmodem is a complete, ITU V.92-compliant, full-featured
modem that provides conventional data formats with connect rates of up to
56,000 bps, full-duplex, over the Public Switched Telephone Network
(PSTN). Offered as a chipset with the Si2493 system-side device and the
Si3018 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. This compact solution eliminates 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, the Si2493 is ideal for
embedded modem applications due to its flexibility, small footprint, and
minimal external component count.
System Block Diagram
This data sheet applies to Si2493
Revision D
Data modem formats
ITU-T, Bell
300 bps up to 56 kbps
V.21,V.22, V.29 Fast Connect
V.44, V.42, V.42bis, MNP2-5
Automatic rate negotiation
V.92 PCM upstream
V.92 Quick connect
V.92 Modem on hold
Type I and II caller ID decode
No external ROM or RAM required
UART, SPI, or parallel interface
Flexible clock options
Low-cost 32.768 kHz oscillator
4.915 MHz oscillator
27 MHz clock input
Integrated DAA
Over 6000 V capacitive
isolation
Parallel phone detect
Globally-compliant line
interface
Overcurrent detection
AT command set support
SMS / MMS support
Firmware upgradeable
EEPROM interface
Lead-free, RoHS-compliant
packages
Commercial or industrial
temperature range
DTMF detection/generation
Set-top boxes
Point-of-sale terminals
Text / video telephones
Digital video recorder
Digital televisions
Remote monitoring
Host
CPU
Host Interface Telco
Si2493
System
Side
Si3018
Line
Side
Global
DAA
BOM
Tip
Ring
UART
SPI
Parallel
Capacitive
Isolation Barrier

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