Details, datasheet, quote on part number: CX24951
CategoryCommunication => Modems => Cable Modems
TitleCable Modems
DescriptionSingle-chip Cable Modem Docsis 2.0-based ic
CompanyConexant Systems, Inc.
DatasheetDownload CX24951 datasheet
Find where to buy


Features, Applications

Conexant's next generation cable modem solution offers a DOCSIS 2.0-based single-chip modem while providing dual software programmable network processing engines

Conexant's broadband communications portfolio includes a comprehensive suite of semiconductor solutions that enable the digital home and information network. The InfoSurgeTM family of products, supporting broadband cable modem applications, presents the industry with yet another example of Conexant's ability to exceed the needs of a growing market segment. The CX24951, Conexant's DOCSIS 2.0-based single-chip cable modem solution, provides backwards compatibility with the DOCSIS 1.1 and the DOCSIS 1.0 standards. The world's fastest, lowest power and smallest cable modem solution, the CX24951, offers 500 MIPS of processing power while consuming just x 17mm BGA package. The CX24951 fully supports the new upstream physical-layer modulation technologies A-TDMA (Advanced Time Division Multiple Access) and S-CDMA (Synchronous Code Division Multiple Access) as specified in DOCSIS 2.0 standard. These new modulation techniques significantly increase upstream cable bandwidth for data transmissions (up to 30Mbps) without requiring any physical rebuilding of cable networks. The CX24951's 500 MIPS and software programmable dual processor architecture with on-chip memory for cable MAC and application layer processing makes it ideally suited for CableHomeTM and PacketCableTM applications.

A-TDMA and S-CDMA DOCSIS 2.0 upstream modulation High level of integration (Single monolithic IC) Dual software programmable network processing engines 500 MIPS of processing power Less than 550mW typical power dissipation Embedded IEEE 802.3 MAC with MII 12Mb USB 1.1 communications transceiver Support for DOCSIS/EuroDOCSIS 2.0/ 1.1/1.0, DVB and proprietary standards CableHome and PacketCable compliant High density, x 17mm BGA package

The CX24951 utilizes the proven software programmable dual processor architecture of its predecessor, the CX24943, and further boosts its performance by increasing the instruction memory size to 128K bytes. The CX24951 is pin compatible with the CX24943. The dual network processing engine architecture offers real-time-critical packet management processing and superior performance. The software programmability of this architecture accommodates application specific requirements, worldwide standards, and manufacturers' unique value added features for maximum flexibility.

Part Number CX24951 Description Single-Chip Cable Modem

The dual processor architecture of the CX24951 allows to be used in CableHome applications, without needing an additional network processor for the firewall and routing features required by the CableHome standard. The firewall and routing algorithms required by CableHome take less than 10 percent of the 500 MIPS processing power of the CX24951, leaving plenty of processing power left for developing custom networking applications. The integrated MII port and the PCMCIA functionality of the integrated host port allow the CX24951 to provide a seamless interface to an array of networking peripherals such as wireless LANs (802.11a/b), HomePlug transceivers, HPNA solutions, and multi-port Ethernet Switches. The CX24951 also supports PacketCable applications by interfacing to Conexant's voice DSP products to execute voice processing algorithms.

The CX24951 supports a number of interfaces including a USB 1.1 communications transceiver, an IEEE 802.3 10/100 Ethernet Media Access Controller (MAC) with a Media Independent Interface (MII) for access to home networking standards. Examples are HPNA 2.0, HomePlug 1.0 and a host interface which supports seamless connectivity to any PCMCIA compliance device such as IEEE 802.11a and IEEE 802.11b wireless transceivers. The CX24951 supports integrated and stand alone cable modems, home networking gateway products, IP (Internet Protocol) telephony products, and digital set-top boxes. The CX24951 was developed using leading-edge process and packaging technologies. This helps drive down the size of the monolithic IC, package and power, while allowing clock rates to increase. The CX24951 dissipates less than 550mW of power setting a new standard for the industry. The CX24951, through its high level of integration, enables manufacturers to develop a complete cable modem with a minimal number of additional components as shown in the CX24951-based cable modem block diagram.

LED Indicators GPIO MII 10/100 Ethernet PHY Conexant HPNA 2.0 PHY Conexant HomePlug PHY USB Host Interface Conexant Voice DSP 2 MB Flash 802.11a/b MAC/PHY

Conexant's seventh-generation physical-layer downstream receiver includes a 10-bit A/D that accepts a direct IF signal (at or 36 MHz) and a QPSK/16/32/64/128/256 QAM demodulator with Annex A, B and C forward error correction. The CX24951 also contains an 11-bit D/A converter, which can accommodate 65 MHz of upstream bandwidth for EuroDOCSIS and DVB applications, and a QPSK/8/16/32/64/128 QAM burst upstream modulator. Conexant's proven PHY technology exceeds all DOCSIS/EuroDOCSIS 2.0/1.1/1.0 requirements for low BER in noise-filled environments. The CX24951 is the fastest solution in the industry with integrated dual software programmable network processing engines on board. Its unique packet management, unified memory architecture, and advanced system buses, maximize performance by allowing segmentation of real-time-critical DOCSIS/EuroDOCSIS 2.0/1.1/1.0 functions from non real-time-critical application processes. The CX24951 processor performance and unique architecture enables DOCSIS/EuroDOCSIS 2.0/1.1/1.0 and other software applications, including VPN firewall for added security and routing for cable home or VoIP for PacketCable. The CX24951 also incorporates a PHS (Payload Header Suppression requirement introduced in DOCSIS 1.1) engine in hardware. Implementation of PHS in hardware further boosts the performance of the CX24951 by relieving the internal CPU from performing repeated filtering operations.

Cable modem manufacturers have to devote a significant amount of resources to bring new certifiable solutions to market. The unique architecture of the CX24951 provides a number of advantages for cable modem manufacturers and cable operators alike. The software programmability of the dual network processing engine allows manufacturers to customize the CX24951 for application specific requirements, both at the cable MAC and software applications layer. The software programmability of the CX24951 allows one base platform to support numerous products, including PacketCable, CableHome and set-top box products as shown in the CX24951based cable modem block diagram. In addition, the architectural similarities between the CX24951 and its predecessor, the CX24943, allows for maximum reuse of certified code. The CX24951 provides the ability to adapt to a multitude of standards by downloading different software into the embedded dual network processing engine, including DOCSIS/EuroDOCSIS 2.0/1.1/1.0, DVB and proprietary standards. Finally, cable operators can download complex feature enhancements above and beyond simple code upgrades to field-deployed solutions, minimizing truck rolls and equipment obsolescence.

To reduce the resources and development time required to bring CX24951-based cable modem solutions to market, Conexant provides complete certifiable DOCSlS/EuroDOCSIS 2.0/1.1/1.0 cable modem reference designs which incorporate all of the hardware and software needed for DOCSIS certification.

Cable modem reference designs include Conexant software that is compliant to DOCSIS/EuroDOCSIS 2.0/1.1/1.0 and include the USB drivers that meet Microsoft's Windows Hardware Quality Lab (WHQL) requirements. Additional software enhancements that are above and beyond standards-based requirements are also included in this complete software offering.

Cable PHY Downstream Cable PHY Upstream S-CDMA A-TDMA Cable MAC Network Processor


Some Part number from the same manufacture Conexant Systems, Inc.
CX25836 Single-chip Video Decoder <<<>>>The CX25836/7 is Conexant's Fourth-generation Video Decoding Solution. It Provides a Highly Integrated Single-chip Analog Video Capture Solution Ideal For a Wide Range of Digital
CX25840 Single-chip Broadcast Audio/video Decoder <<<>>>The CX25840/1/2/3 is Conexant's Second Generation of Audio/video (A/V) Decoders Built on The Success of The CX23880 Family of Broadcast A/v Pci Decoders.
CX25840 Audio/video Decoder<<<>>>the CX25840/1/2/3 Audio/video And Data Usb Streaming Solution is The First of Its Kind. It Delivers High-quality Video, Excellent Stereo Audio Quality, And Data Services For Example,
CX25841 Single-chip Broadcast Audio/video Decoder <<<>>>The CX25840/1/2/3 is Conexant's Second Generation of Audio/video (A/V) Decoders Built on The Success of The CX23880 Family of Broadcast A/v Pci Decoders.
CX25841 Audio/video Decoder<<<>>>the CX25840/1/2/3 Audio/video And Data Usb Streaming Solution is The First of Its Kind. It Delivers High-quality Video, Excellent Stereo Audio Quality, And Data Services For Example,
CX25842 Single-chip Broadcast Audio/video Decoder <<<>>>The CX25840/1/2/3 is Conexant's Second Generation of Audio/video (A/V) Decoders Built on The Success of The CX23880 Family of Broadcast A/v Pci Decoders.
CX25842 Audio/video Decoder<<<>>>the CX25840/1/2/3 Audio/video And Data Usb Streaming Solution is The First of Its Kind. It Delivers High-quality Video, Excellent Stereo Audio Quality, And Data Services For Example,
CX25843 Single-chip Broadcast Audio/video Decoder <<<>>>The CX25840/1/2/3 is Conexant's Second Generation of Audio/video (A/V) Decoders Built on The Success of The CX23880 Family of Broadcast A/v Pci Decoders.
CX25843 Audio/video Decoder<<<>>>the CX25840/1/2/3 Audio/video And Data Usb Streaming Solution is The First of Its Kind. It Delivers High-quality Video, Excellent Stereo Audio Quality, And Data Services For Example,
CX25870 Adaptive Flicker Filter Video Encoder
CX25872 High Performance Video Encoder
CX25874 High Performance Video Encoder With HDTV Output
CX260083 10 GBPS Post-amplifier
CX28331-1x Single/dual/triple E3/DS3/STS-1 Line Intrface Unit

BT8370EPF : Fully Integrated T1/E1 Framer And Line Interface

CN2811 :

CN8472AEPF : Multichannel Synchronous Communications Controller

CX25872 : High Performance Video Encoder

CX28331-3X : Single/dual/triple E3/DS3/STS-1 Line Intrface Unit

CX65003 :

CX74005 : Demodulator Rfic

LSD20463 : Smart HCF Mobile Modem

RM912 : Pci Video Decoder

TU70-D200-011 :

CX90412 : Voice Coprocessor The Conexant CX90412 Voice Coprocessor (VCP) compresses and decompresses two channels of packet voice from telephone lines or handsets and interfaces to a host network processor over a parallel interface bus. The CX90412 is packaged in a 64-pin QFN. The CX90410/CX90411 VCP com

CX25894 : Single-chip, High-performance (dvi) Digital Video Transmitter

Same catergory

BCM94500 : DBS and Satellite.

CMX208 : Protocol/Control. Isdn Dual Telephony Protocol Engine. Applications Supports Incoming and Outgoing Calls Independent Port Configuration Flexible B-channel Mapping Supports CTR3 Approval Full API Available Feature Phones Pay-Phones PABX Telephones DECT Cordless Phones Reference Designs Available The is an ISDN telephony protocol engine which implements the lower level ISDN interface and communicates with.

EM57P300 : Speech Synthesizer. Tiny Controller-based Sound Processor. is a tiny-controlled-based voice/dual tone melody/dual tone sound effect Ics which contain all the function of EM57000 series and has an OTP (One Time Programmable) ROM inside. EM57P300 ROM x 10 bits (21 sec@6K sample rate). Working Voltage ~ 5.1V. One 4-bit input port, two 4-bit I/O ports, and 32x4 bits RAM. 8k (maximum) program ROM. One 6-bit timer.

FX203 : Selcall Tone Codec With Microprocessor Interface. Selcall Tone Codec with Microprocessor Interface Single-Chip Selcall Codec CCIR, EEA or ZVEI/SZVEI Versions On-Chip General Purpose Timer Separate General Purpose 4-bit input/2-bit Output Port 0 Mobile or Handheld Selcall 0 4-bit Microprocessor I/O Data Port 0 Powersave Facility. Uses Low-Cost 4MHz Xtal 0 Low-Power 5V CMOS Process Brief The is a single-chip.

HFBR-5601 : Gigabit Interface Converters (GBIC) For Gigabit Ethernet. Agilent HFBR-5601/HFCT-5611 Gigabit Interface Converters (GBIC) for Gigabit Ethernet Compliant with Gigabit Interface Converter Rev. HFBR-5601 is compliant with proposed s for IEEE 802.3z/D5.0 Gigabit Ethernet (1000 Base-SX) HFCT-5611 is compliant with the ANSI 100-SM-LC-L revision 10 km link Performance: 500 m with 50/125 m MMF 220 m with 62.5/125.

IS51VV4064 : Parallel Search Processor. 64x1Kx64(B)/32(T). V4064 IS51V Parallel Sear ch P rocessor P roduct Brief Product Search Processor Another Advanced Memory Solution from ISSI The IS51V V4064 Parallel Search Processor is the most flexible and highest-performing CAM-based (Content Addressable Memory) search processor on the market today. The patent-pending architecture IS51V V4064 multiple CAMtilesTM,.

MAX328CEE : Ultra-low Leakage Monolithic CMOS Analog Multiplexers.

MAX3850EVKIT : MAX3850EVKIT Evaluation Kit For The MAX3850. The MAX3850 evaluation kit (EV kit) is an assembled demonstration board that provides optical or electrical evaluation of the MAX3850. The EV kit is composed of two independent electrically isolated sections on the PC board. The output of the electrical evaluation section is interfaced to an SMA connector, which can be connected a 50 terminated oscilloscope.

MC145512P : Pulse/tone Repertory Dialer Low Power Siilicon-gate CMOS.

PX4800 : Sonet/sdh Tributary Digital Cross Connect. A single stage, non-blocking time switch for cross-connecting virtual tributaries ( VTs) or tributary units (TUs) with an aggregate bandwidth of 2488 Mbps Provides for cross-connection across sixteen STS-3/STM-1 or four STS-12/STM-4 (or any combination of these two). Each stream is an industry standard telecom bus Performs programmable even or odd parity.

TDF1737DP : Interface Circuit - Relay And Lamp-driver. HIGH OUTPUT CURRENT ADJUSTABLE SHORT-CIRCUIT PROTECTION THERMAL PROTECTION WITH HYSTERESIS TO AVOID THE INTERMEDIATE OUTPUT LEVELS LARGE SUPPLY VOLTAGE RANGE 45 V The is a monolithic amplifier designed for high current and high voltage applications, specifically to drive lamps, relays and control of stepper motors. This device is essentially blow-out.

TNETE2004 : Transceiver/Repeater. Mdio-managed Quadphy Four 10base-t Physical-layer Interfaces.

W185-5 : Six Output Peak Reducing Emi Solution. Cypress PREMISTM family offering Generates an EMI optimized clocking signal at the output Selectable output frequency range Six or 0% down or center spread outputs One non-Spread output of Reference input Integrated loop filter components Operates with or 5V supply Low power CMOS design Available in 24-pin SSOP (Shrink Small Outline Package) Outputs.

W91416 : Tone/pulse Dialer With Save Function.

XR16L2752 : 2.5V 3.3V And 5V Duart With 64-Byte Fifo. The is a low voltage dual universal asynchronous receiver and transmitter (UART) with 5 Volt tolerant inputs. The device operates from to 5.5 Volt supply range and is pin-to-pin compatible to Exar's ST16C2552 and XR16C2852. The 2752 register set is compatible to the ST16C2552 and the XR16C2852 enhanced . It supports the Exar's enhanced of 64 bytes of TX and RX FIFOs,.

ZL30123 : SONET/SDH Low Jitter Line Card Synchronizer The ZL30123 SONET/SDH Line Card Synchronizer is a highly integrated device that provides timing and synchronization for network interface cards. It incorporates two independent DPLLs, each capable of locking to one of eight input references and provides a wide variety of synchronized output clocks and frame.

MH88632B : Loop Start And Ground Start Central Office Interface Circuit With Programmable Line Impedance The MH88632B Central Office Interface Circuit provides a complete analog and signalling link between audio switching equipment and a subscriber line. The device is available in a single in line package for high packing densities. The device is fabricated using.

0-C     D-L     M-R     S-Z