Embedded Dial-Up Modems
Controller-Based Modems
SCXV.92/V.34/V.32bis Modem
CX86500
Controller-Based Modem with SmartDAA 3
for Embedded Applications
Conexant’s portfolio includes a comprehensive suite of semiconductor
solutions for broadband communications, enterprise networks and the
digital home. The CX86500 modem paired with the CX20493 SmartDAA 3
line side device (LSD), is ideal for embedded applications such as Point of
Sale (POS) terminals, Set-Top Boxes, Video Recorders, Meters, Security
Systems, Remote Site Management and other applications that require
robust dial-up connectivity.
The SCXV.xx modem device set consists of a CX86500 modem in either a
28-pin thin shrink small outline package (TSSOP) or 38-pin TSSOP package,
and CX20493 SmartDAA 3 LSD in either a 28-pin quad flat no-lead (QFN)
package or a 32-pin low profile quad flat package (LQFP). The CX86500
28-pin TSSOP supports serial DTE interface. The CX86500 38-pin TSSOP
supports serial and parallel interface as well as a nonvolatile random access
memory (NVRAM) option.
The device set integrates the microcontroller, digital signal processor, memory,
and a worldwide DAA/telephone line interface function that operates with
public switched telephone network (PSTN) telephone lines worldwide.
The SCXV.92 modem supports data modes up to 56 kbps and includes
features such as Quick Connect, Modem-on-Hold, and PCM Upstream.
SCXV.34 (V.34 option) and SCXV.32bis (V.32bis option) are also available.
Conexant’s CX20493 SmartDAA 3 LSD eliminates the need for bulky
analog transformers, relays, and opto-isolators typically used in discrete
DAA implementations. The CX20493 operates without drawing power from
the phone line, unlike line-powered DAAs, and is therefore not subject to
variations in line voltage conditions. The LSD also adds enhanced telephony
extension features to the modem’s operation. Incorporating Conexant’s
proprietary digital isolation barrier (DIB) design and other innovative DAA
features, the SmartDAA architecture simplifies application design and
minimizes layout area to reduce design cost.
The CX86500 28-pin TSSOP is pin-compatible with SmartV.XX 28-pin CTLGA
and SCXV.22bis 28-pin TSSOP.
®
Distinguishing Features
• Controller-based modem, no external
memory required
• V.92, V.34 and V.32bis options–V.92
includes Quick Connect, Modem-on-Hold
and PCM Upstream
• V.29 FastPOS and V.22bis fast connect
• V.80 sync access mode, synchronous
and asynchronous DTE interface
• V.44/V.42bis and MNP5 data compression
• V.42 and MNP2-4 error correction
• Selectable 28.224 MHz or 27 MHz
frequency of operation
• 28 or 38-pin TSSOP package available
- Serial or parallel interface
- Optional NVRAM support
- 28-pin TSSOP is pin-compatible
with SCXV.22bis and SmartV.XX modems
• CX20493 SmartDAA 3 LSD in a 28-pin QFN
or a 32-pin LQFP package
• Worldwide support
• Quick time-to-market
• Reference design supports 5KV isolation
Part Number
CX86500
Description
SCXV.92/V.34/V.32bis Modem
Embedded Dial-Up Modems
Controller-Based Modems
CX86500
Serial or
Parallel*
Interface
V.92/V.34/V.32bis Modem
28-Pin or 38-Pin TSSOP
28.224 MHz
or
27.000 MHz
Crystal
or Clock
Digital Isolation
Barrier
(DIB)
Components
Optional
NVRAM*
CX20493
SmartDAA 3
Line Side Device (LSD)
28-Pin QFN
or 32-pin LQFP
External
Discrete
Components
Telephone
Line
TIP
RING
SCXV.92/V.34/V.32bis Modem Block Diagram
*38-pin version only
26mm x 59mm
SCXV.92/V.34/V.32bis Modem Reference Design
CX86500 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 V22bis fast connect
- V.80 Synchronous Access Mode
• V.44/V.42bis/MNP5 data compression
• V.42/MNP2-4 Error correction
• Call waiting (CW) detection for selected countries
• DTE/host interface
- Serial DTE interface
- Parallel 16550 UART-compatible host interface
(38-pin version only)
- Direct mode
- Synchronous mode and asynchronous mode
• Hardware and software flow control and speed buffering
• Embedded and upgradable 63 country profiles
• Serial NVRAM interface for optional country profile storage
(38-pin version only)
Conexant has a broad portfolio of semiconductor
products, including:
• DSL, dial-up, and cable modem solutions
• Home network processors
• Broadcast video encoders and decoders
• Digital set-top box components and system solutions
© 2004, Conexant Systems, Inc. All Rights Reserved. Conexant and the Conexant
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.
THIS MATERIAL IS PROVIDED AS IS AND WITHOUT
• Full-duplex 8-bit/16-bit PCM voice pass-through mode
• Selectable 28.224 MHz or 27.000 MHz frequency of operation
• Worldwide operation
- Complies to TBR21 and other country requirements
- Type I and Type II Caller ID (CID) decoding for
selected countries
- 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
- Small, low-profile modem packages
- Reference design supports 5KV isolation
SmartDAA Features
• Extension pick-up detection
• Digital line protection
• Line reversal detection
• Remote hang-up detection
• Worldwide compliance
Conexant also offers wireless data and networking solutions that
includes HomePlug, HomePNA, and WLAN (802.11) components
and reference designs.
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NON-INFRINGEMENT.
Conexant shall not be liable for any
www.conexant.com
General Information:
U.S. and Canada: (888) 855-4562
International: (732) 345-7500
Headquarters
100 Schultz Drive
Red Bank, NJ 07701
Order# 102351A
special, indirect, incidental or consequential damages as a result of its use.
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