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CX20493-21规格书详情
Introduction
Overview
The Conexant® SmartV.XX Modem is a full-featured, worldwide, controller-based modem that integrates modem controller (MCU), modem data pump (MDP), 256 KB ROM, 32 KB RAM, and SmartDAA system side device (SSD) functions onto a single die.
The modem operates by executing firmware from internal ROM and RAM. Optional customized firmware is supported with optional external flash ROM memory. Additionally, added/modified country profiles are supported by internal SRAM patch (maximum of one profile) or serial EEPROM. Downloadable architecture supports downloading of customized MCU firmware from the host/DTE to the SmartV.XX modem.
Features
General Modem Features
• Data modem
− 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.29, FastPOS (V.29), V.22 bis, V.22, V.22 Fast Connect, V.23, V.21, Bell 212A, and Bell 103
− V.250 and V.251 commands
• Data compression and error correction
− V.44 data compression
− V.42 bis and MNP 5 data compression
− V.42 LAPM and MNP 2-4 error correction
• Fax modem send and receive rates up to 14.4 kbps
− V.17, V.29, V.27 ter, 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
• Interfaces to optional external ROM/flash ROM, RAM, and/or optional serial EEPROM
• Data/Fax/Voice call discrimination
• Hardware-based modem controller
• Hardware-based digital signal processor (DSP)
• Worldwide operation
− Complies to TBR21 and other country requirements
− On-hook and/or off-hook Caller ID detection for selected countries
− Call progress, blacklisting
− Internal ROM includes default values for 29 countries
− Additional and modified country profile can be stored in internal SRAM
• Caller waiting detection
• 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
• Modem customization available through patch code that can be stored in optional serial EEPROM or internal SRAM
• Telephony/TAM
− V.253 commands
− 2-bit and 4-bit Conexant ADPCM, 8-bit linear PCM, and 4-bit IMA coding
− 8 kHz sample rate
− Concurrent DTMF, ring, and Caller ID detection
• Full-duplex speakerphone (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
• Built-in host/DTE interface
− Parallel 16550A UART-compatible interface up to 230.4 kbps
− Serial ITU-T V.24 (EIA/TIA-232-E) logical interface up to 115.2 kbps
• Downloadable architecture
• Direct mode (serial DTE interface)
• Flow control and speed buffering
• Automatic format/speed sensing
• Serial async/sync data; parallel async data
• Thin packages support low profile designs (1.6 mm max. height)
− CX81801 Modem device in 128-pin TQFP
− CX20493 LSD in 28-pin QFN
− CX20442 VC in 32-pin TQFP
• +3.3V operation with +5V tolerant digital inputs
• Typical power use
− CX81801 and CX20493: 209 mW (Normal Mode); 59 mW (Sleep Mode)
− CX20442: 5 mW (Normal Mode)
SmartDAA Features
• System side powered DAA operates under poor line current supply conditions
• Modem Wake-on-Ring
• Ring detection
• Line current loss detection
• Pulse dialing
• Line-in-use detection during on-hook operation
• Remote hang-up detection for efficient call termination
• Extension pickup detection
• Digital PBX line protection
• Meets worldwide DC Voltage/Current (VI) masks requirements
Applications
• Set top boxes
• Gaming devices
• Point of sale terminals
• Remote monitoring and data collections systems
• Handheld computers
• Other embedded systems
产品属性
- 型号:
CX20493-21
- 制造商:
CONEXANT
- 制造商全称:
CONEXANT
- 功能描述:
SmartV.XX Modem
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
CON |
2023+ |
QFN-28 |
80000 |
一级代理/分销渠道价格优势 十年芯程一路只做原装正品 |
询价 | ||
2023+ |
3000 |
进口原装现货 |
询价 | ||||
CONEXANT |
22+ |
QFN-28 |
9600 |
原装现货,优势供应,支持实单! |
询价 | ||
CONEXANT |
22+ |
QFN-28 |
48953 |
郑重承诺只做原装进口货 |
询价 | ||
CONEXANT |
0516+PB |
QFN |
4485 |
原装现货!低价支持实单!贵了给接受价格! |
询价 | ||
CONEXANT |
06+05+ |
QFN-28 |
880000 |
明嘉莱只做原装正品现货 |
询价 | ||
CONEXANT |
BGAQFP |
6688 |
15 |
现货库存 |
询价 | ||
CONEXANT |
23+ |
QFN28 |
2000 |
原装房间现货假一赔十 |
询价 | ||
CONEXANT |
21+ |
QFN |
50000 |
全新原装正品现货,支持订货 |
询价 | ||
CONEXANT |
20+/21+ |
QFN |
5600 |
全新原装进口诚信经营 |
询价 |