DS96175CN

Overview
The ConexantSMXXD Modem is a full-featured, controller-based modem that integrates modem controller (MCU), modem data pump (MDP), 256 KB ROM, 32 KB RAM, and analog line interface codec functions into a single package.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)
• Support for many country-specific DAA configurations − 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) − CX06833 Modem device in 144-pin TQFP − CX20442 VC in 32-pin TQFP
• +3.3V operation with +5V tolerant digital inputs
• Typical power use − CX06833: 191 mW (Normal Mode); 53 mW (Sleep Mode) − CX20442: 5 mW (Normal Mode)