CX81801-8X Просмотр технического описания (PDF) - Conexant Systems

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CX81801-8X

SmartV.XX Modem

Conexant Systems 

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CX81801-7x/8x SmartV.XX Modem Data Sheet

• 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

102199B

Conexant

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