Specifications

9
Modems|
addition to the InfoSurge™ family of products, which support
a variety of broadband applications. The CX24943 builds on
the proven architecture of its predecessor and leads the industry
in cost-effectiveness—through software programmability, high
integration, robust performance, low power, and compact design.
Furthermore, its flexible architecture accommodates application
specific requirements, worldwide standards, and unique value
added features, enabling manufacturers to produce advanced,
diverse, yet affordable, consumer premise equipment (CPE) to
take advantage of this rapidly expanding market. The CX24943
supports internal and external PC cable modems, home networking
gateway products, IP (Internet Protocol) telephony products, and
digital set-top boxes. DOCSIS/EuroDOCSIS 1.0/1.1 Cable Modem
Reference Designs--based on the CX24943 and CN2811
RF Tuner--are available to qualified customers worldwide.
Features
• High Level of Integration
• Dual sw programmable network-processing engines
• 225 MHz system processor
• Less than 500mW typical power dissipation
• Embedded IEEE 802.3 MAC with MII
• Support for DOCSIS/EuroDOCSIS 1.0/1.1 and Home
Networking standards
CN9414 Single-Chip Cable Modem
The CN9414 is the first true single-chip cable modem for the
production of cable modem products with 10/100 Ethernet,
USB or PCI interfaces. The product’s enhanced programmable
cable MAC gives the customer the advantage of field upgrades of
low-level MAC code to Multiple System Operator (MSO)-required
management upgrades. The CN9414 has been designed to not
only meet the DOCSIS 1.0 and 1.1 specifications, but also the
EuroDOCSIS and DVB specifications.
Features
• Direct IF sampling at 44 MHz and 36 MHz
(DOCSIS/EuroDOCSIS/DVB)
• Integrated A/D and D/A
• FEC Annex A, B and support; 12, 17, 34, 51, 68, 102,
and 204 (internal)
• Embedded ARM9 HOST microprocessor
• Integrated 10/100 Ethernet MAC with MII
• 12 Mb USB peripheral transceiver
• Low-cost support for 16/64 Mb SDRAM Technology
CN2811 Digital Cable Tuner RF IC
The CN2811 is a single-chip digital cable tuner. The CN2811 supports
both DOCSIS and DVB/DAVIC standards for computer cable
modems and Set Top Boxes. The chip provides dual-conversion
technology, which offers superior digital performance, reduced
tuner systems bill of materials cost and requires no calibration. The
tuner converts a 50
— 860 MHz RF signal to an IF signal at either
36 or 44 MHz. The device works seamlessly with Conexant’s digital
cable transceiver solutions.
Features
• Single-chip RF to IF CATV receiver
• 50 — 860 MHz frequency band
• 36 — 44 MHz IF output
• Dual conversion architecture meets
DOCSIS 1.1 requirements
Part Number CX24943
Description Next Generation Single-Chip Cable
Modem IC
Part Number CN9414
Description Single-Chip Cable Modem
CN9414 system block diagram
CN2811 functional block diagram
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