MODEM S OLU TION S

Si24xx System Side

To Host

CLKIN/

XTAL1

RAM

ROM

SSI Digital Audio Interface

Controller/

DSP

Si3018/10 Line Side

Ring Detect

AC Termination

DC Termination

Codec

Hybrid

C1A

C2A

TIP

RING

BOM

Host

Interface

SPI,

UART or

Parallel

PLL/

Clock

Logic

XTAL0

BOM

Si3000 Voice Codec

(Optional)

Aout

Aoutb

SCLK

FSYNCH

SDI

SDO

4

DESCRIPTION

The ISOmodem family of products are complete modems ranging in speed from 2400 bps to

56,000 bps. Offered as a chipset with a 16-pin global 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. The universal

design can support all speeds and countries with a single Bill of Materials (BOM). These compact

solutions eliminate the need for a separate DSP, modem controller, codec, transformer, relay,

opto-isolators, clocking crystal and 2-4 wire hybrid. These devices are ideal for embedded data

modem and data/voice modem applications due to their flexibility, small footprint, and minimal

external components.

MORE INFORMATION AND DOCUMENTATION DOWNLOADS AT:

silabs.com/ISOmodem

FEATURES

• AT command set

• ITU-T “V-dot” protocols up to 56 kbps

• Error correction and data compression

• Fast-connect protocols for POS

• Security industry protocols,

e.g. “Contact ID” and SIA

• SMS/MMS support including China

• DTMF generation and detection

• General purpose tone detectors

• Global Caller ID type 1 and type 2 decoding

• Integrated DAA

– Over 6 kV surge immunity

– On- and off- hook line voltage monitoring

– Parallel phone (intrusion) detection

– Over-current detection

• Supports handset, speakerphone and

answering machine functionality

• Advanced voice processing

– Acoustic Echo Cancellation

– Line Echo Cancellation

– Limiter for “Soft Clipping”

– Programmable filtering and pre-emphasis

• UART, SPI or parallel host interface

• Flexible clock options including low-cost

32.768 kHz oscillator

• Low power; single 3.3 V supply

– 15 mw in wake-on-ring or wake-on-polarity

– 56 mW in normal operation

• Firmware upgradeable

• EEPROM interface

• Lead-free, RoHS-compliant packages

• Commercial or industrial temperature range

BENEFITS

• Smallest, most compact modem solution

• Lowest external component count and cost

• Minimal software development

• Proven performance and global compliance

APPLICATIONS

• Set-top boxes

• Point-of-sale terminals

• Security systems

• Videophones

• Medical monitoring equipment

EMBEDDED DATA MODEMS AND DATA/VOICE

MODEMS WITH INTEGRATED GLOBAL DAA

www.silabs.com/ISOmodem