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are owned by their respective owners. Although Conexant strives for accuracy

in all its publications, this material may contain errors or omissions and is

ANy ExPrESS or iMPliED wArrANTiES, iNClUDiNg MErChANTABiliTy, fiTNESS for A

PArTiCUlAr PUrPoSE AND NoN-iNfriNgEMENT.

Conexant shall not be liable for any

special, indirect, incidental or consequential damages as a result of its use.

CX93021-2x CSM92/34/32-SP Modem Simplified Interface

CX93021 Modem

36-Pin QFN

MCU/DSP/

SmartDAA

Interface

DTE/Host

Interface

Serial

Interface

RAM

TIP

RING

External

Discrete

Components

Telephone

Line

Digital Isolation

Barrier (DIB)

CX20548

SmartDAA 4

Line Side Device (LSD)

16-Pin QFN

Line Side

DIB

Interface

(LSDI)

Codec

Telephone

Line

Interface

DAA Hardware

ROM

Optional

NVRAM

28.224 MHz

or

27.000 MHz

Crystal or Clock

Source

CX20452

Codec

24-Pin QFN

(Optional)

Mic

Speaker

09-2846

Embedded Dial-Up Modems

Controller-Based Modems

www.conexant.com

General Information:

U.S. and Canada: (888) 855-4562

International: 1+ (949) 483-3000

Headquarters

4000 MacArthur Blvd.

Newport Beach, CA 92660

Doc# PBR-202165

Conexant Product Portfolio

Conexant’s comprehensive product portfolio includes solutions for imaging, audio, and video applications, and analog modems that enable cost-

effective Internet access. The company’s broadband access products include end-to-end solutions for xDSL networks, and PON solutions for fiber

optic applications.

CX93021-2x Features

• Modulations and protocols

- ITU-T V.92: Quick Connect, Modem-on-Hold and

PCM upstream

- V.90/V.34/V.32bis/V.32

- V.22bis/V.22/V.23/V.21

- V.23 reverse, V.23 half-duplex

- Bell 212A/Bell 103

- V.29 FastPOS and V.22 Fast Connect

- SIA Protocol and Contact ID for alarm equipment

- V.80 Synchronous Access Mode

- V.17/V.29 Fax Class 1/1.0 and Fax Class 2

• V.44/V.42bis/MNP5 data compression

• V.42/MNP2-4 Error correction

• Call waiting (CW) detection for selected countries

• Asynchronous Serial DTE interface

• Hardware and software flow control and speed buffering

• Embedded and upgradable 63 country profiles

• Optional serial NVRAM interface for country profile

storage and code upgrades

• Full-duplex 8-bit/16-bit PCM voice pass-through mode

• 28.224 MHz or 27.000 MHz frequency XTAL or clock input

• Worldwide operation

- Complies to TBR21 and other country requirements

- Type I and Type II Caller ID (CID) decoding

- Type II Caller ID snooping

- Call progress, blacklisting

- Meets worldwide DC mask requirements

• Low power and voltage

- Single +3.3 V supply

- Low power consumption mode

- +3.3 V I/O level

• Compact, robust board design

- Reference design files provided for quick time-to-market

- Reference design tested for PTT and TBR 21 approvals

- Small, low-profile modem packages

- Reference design supports 6KV isolation

• Telephony/TAM

– V.253 commands

– 2-bit and 4-bit ADPCM, 4-bit IMA ADPCM, 8-bit and 16-bit

linear PCM, and 8-bit μ-law and A-law PCM coding

– 8 kHz sample rate

– Concurrent DTMF, ring, and Caller ID detection

SmartDAA features

• Extension pick-up detection

• Digital line protection

• Line reversal detection

• Remote hang-up detection

• Worldwide compliance

• CX20548 SmartDAA 4 LSD in a 16-pin QFN

• Worldwide support with a single design

Conexant’s advanced proprietary speakerphone algorithm, which

supports full-duplex voice conversation with acoustic, line and handset

echo cancellation to ensure clean and noise free voice quality.

In TAM mode, enhanced 2-bit or 4-bit per sample coding schemes at 8

kHz sample rate provide flexible format compatibility and allows efficient

digital storage of voice/audio. Also supported are 8-bit A-law, μ-law, and

linear coding and IMA 4-bit Adaptive Differential Pulse Code Modulation

(ADPCM) coding. This mode supports applications such as digital

telephone answering machine, voice annotation, and recording from

and playback to the telephone line.

Small, low-profile packages, reduced voltage operation, and low power

consumption make this device set an ideal solution for embedded

applications.