Embedded Dial-Up Modems
Controller-Based Modems
DAA Hardware
CX93011 Modem
20-Pin QFN
Serial
Interface
DTE/Host
Interface
Digital Isolation
Barrier (DIB)
MCU/DSP/
SmartDAA
Interface
28.224 MHz
or
27.000 MHz
Crystal or Clock
Source
CX20548
SmartDAA 4
Line Side Device (LSD)
16-Pin QFN
Line Side
DIB
Interface
(LSDI)
Codec
Telephone
Line
Interface
External
Discrete
Components
Telephone
Line
TIP
RING
RAM
Optional
NVRAM
ROM
CX93011 CSMxx Modem Simplified Interface
CX93011 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 V22 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
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 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.
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logo are registered trademarks of Conexant Systems, Inc. All other trademarks
are owned by their respective owners. Although Conexant strives for accuracy
in all its publications, this material may contain errors or omissions and is
subject to change without notice.
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ANy ExPrESS or iMPliED wArrANTiES, iNClUDiNg MErChANTABiliTy, fiTNESS for A
PArTiCUlAr PUrPoSE AND NoN-iNfriNgEMENT.
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Doc# PBR-201444
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