Product Brief

CX81801 Serial/Parallel Modem
ImagingSmart™ Product Brief
Third Generation SmartDAA® and Speakerphone
Support
Product Overview
Key Features
Conexant’s ImagingSmart™
portfolio includes a
comprehensive suite of
semiconductor solutions that
enable the connected home
office and information network.
The CX81801 modem is ideal
for embedded applications such as POS terminals,
STBs, video recorders metering, security, remote site
management, and any other application that requires
robust dial-up connectivity.
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The CX81801 integrates the microcontroller, DSP,
memory, and a worldwide DAA/telephone line interface
function that operates with PSTN telephone lines
worldwide.
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The CX81801 modem features data/fax/TAM with up to
56kbps analog data modem operation and 14.4kbps fax
modem operation. The V.92 modem includes quick
connect, modem-on-hold, and PCM upstream. The
CX81801 is also available in V.34 or V.32bis options.
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The CX81801 modem device set consists of a CX81801
modem in either a 128-pin TQFP or 28-pin CTLGA
package and an LSD. The CX81801 128-pin TQFP
supports:
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Either the SmartDAA® 3 LSD (CX20493 28-pin
QFN) or the SmartDAA (CX20463 32-pin TQFP).
The SmartDAA 3 requires fewer discrete
components for a low-cost solution.
A serial and parallel interface, and an optional
FDSP.
The CX81801 modem is also available in a 28-pin
CTLGA for the serial interface only, with the SmartDAA
3 LSD (CX20493 28-pin QFN) applications that require
the smallest possible dimensions. The CTLGA package
has the same footprint as a TSSOP package.
Conexant Confidential
• www.conexant.com • 031PBR00
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Data modem modulations
– Quick connect, modem-on-hold, and PCM
upstream functions (V.92 models)
– ITU-T V.92, V.90 (V.92 models), V.34 (V.92 and
V.34 models), V.32bis, V.32, V.22bis, V.22, V.23,
and V.21
– Bell 212A and Bell 103
– V.250 and V.251 commands
Fax modem send and receive rates up to 14.4kbps
FastPOS (V.29) and V.22 fast connect
V.44/V.42bis and MNP5 data compression
V.42 and MNP2-4 error correction
128-pin TQFP package available
– Serial or parallel interface
– Optional FDSP
– SmartDAA 3 or SmartDAA option
28-pin CTLGA package available
– Serial interface
– Pin-compatible with CX84100 V.22bis modem
– Small form-factor
– SmartDAA 3
SmartDAA 3
– Line-in-use detection
– Digital line guard (programmable)
– Extension pick-up detection
– Remote hang-up detection
Worldwide support
Quick time-to-market
Low-cost solution
System Block Diagram
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OR
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(OST"US
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ONLY
CX81801
Smart Modem
28-pin CTLGA
or
128-Pin TQFP
$IGITAL
)SOLATION
"ARRIER
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CX20493
(28-Pin QFN)
SmartDAA
Line Side Device
(LSD)
CX20442
Voice Codec (VC)
32-Pin TQFP
(Optional for
128 TQFP only)
4ELEPHONE
,INE)NTERFACE
$ISCRETE
#OMPONENTS
4IP
Ring
4ELEPHONE
,INE
4IP
Ring
(ANDSET
/PTIONAL
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3PEAKER /PTIONAL
CX81801 Serial/Parallel Modem | ImagingSmart™ Product Brief
Additional Features
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General Modem Features
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Data compression and error
correction
– V.44 data compression
– V.42bis and MNP 5 data
compression
– V.42 LAPM and MNP 2-4
error correction
Fax modem send and receive
rates up to 14.4kbps
– V.17, V.29, V.27ter, and V.21
channel 2
– EIA/TIA 578 class 1 and T.31
class 1.0
V.80 synchronous access mode
supports host-controlled
communication protocols with
H.324 interface support
Data/fax/voice call discrimination
Worldwide operation
– Complies to TBR21 and
other country requirements
– Caller ID detection for many
countries
– Call progress, blacklisting
– Internal ROM includes
default values for 29
countries
– Additional modified country
profiles can be stored in
internal SRAM (all CX81801)
or optional serial EEPROM
(128-pin TQFP only)
Caller ID detect
– On-hook caller ID detection
– Off-hook call waiting caller ID
detection during data mode
in V.92, V.90, V.34, V.32bis,
and V.32
Distinctive ring detect
Direct mode (serial DTE interface)
Flow control and speed buffering
3.3V operation with 5V tolerant
digital inputs
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Telephony/TAM
– V.253 commands
– 2-bit and 4-bit Conexant
ADPCM, 8-bit linear PCM,
and 4-bit IMA coding
– 8kHz sample rate
– Concurrent DTMF, ring, and
caller ID detection
Automatic format/speed sensing
General Modem Features for
the 28-Pin CTLGA
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Built-in host/DTE interface—
Serial ITU-T V.24 (EIA/TIA-232-E)
logical interface up to 115.2kbps
Serial async/sync data
Thin packages support low
profile designs (1mm maximum
height)
– CX81801: Modem in a 28-pin
CTLGA
– CX20493: LSD in a 28-pin QFN
Typical power use
– 220mW (normal mode)
– 56mW (sleep mode)
General Modem Features for
the 128-Pin TQFP
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Interfaces to optional external
ROM/flash ROM, RAM, and/or
serial EEPROM—Supports
custom firmware
Modem customization available
through a patch code that can be
stored in optional serial
EEPROM or internal SRAM
FDSP mode using optional
CX20442 voice CODEC (S models)
– Microphone and speaker
interface
– Telephone handset or
headset interface
– Acoustic and line echo
cancellation
– Microphone gain and muting
– Speaker volume control and
muting
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Built-in host/DTE interface
– Serial ITU-T V.24 (EIA/TIA232-E) logical interface up to
115.2kbps
– Parallel 16550A UARTcompatible interface up to
230.4kbps
Serial async/sync data and
parallel async data
Thin packages support low profile
designs (1.6mm maximum height)
– CX81801: Modem in a
128-pin TQFP
– CX20493: LSD in a 28-pin QFN
or 20463 LSD in 32-pin TQFP
– CX20442: VC in 32-pin TQFP
Typical power use
– CX81801 and CX20493:
220mW (normal mode) and
56mW (sleep mode)
– CX81801 and CX20463:
220mW (normal mode) and
56mW (sleep mode)
– CX20442: 5mW (normal mode)
SmartDAA Features
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System-side powered DAA
operates under poor line current
supply conditions
Modem wake-on-ring
Ring detection
Line polarity reversal detection
Line current loss detection
Pulse dialing
Line-in-use detection during onhook operation
Remote hang-up detection for
efficient call termination
Extension pick-up detection
Call waiting detection
Digital PBX line protection
Meets worldwide DC masks
requirements
www.conexant.com
Headquarters: 1901 Main Street, Suite 300 Irvine, CA,92614
General Information: U.S. and Canada: 888-855-4562 | International: 1 + 949-483-3000
© 2014 Conexant Systems, Inc. All rights reserved.
031PBR00