CX81801-7x/8x SmartV.XX Modem Data Sheet
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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.
The SmartV.XX Modem device set consists of a CX81801 modem device in a 128-pin
TQFP and a CX20493 SmartDAA Line Side Device (LSD) in a 28-pin QFN.
Conexant’s SmartDAA® technology eliminates the need for a costly analog transformer,
relays and opto-isolations typically used in discrete DAA (Data Access Arrangement)
implementations. The SmartDAA architecture also simplifies product implementation by
eliminating the need for country-specific board configurations enabling worldwide
homologation of a single modem board design and a single bill of materials (BOM).
Low profile, small TQFP and QFN packages with reduced voltage operation and low
power consumption makes this device set an ideal solution for embedded and palmtop
application using parallel host or serial DTE interface.
The SmartV.XX Modem supports data rates up to V.92, data compression, error
correction, fax rates up to 14.4 kbps and speakerphone mode.
In V.92 and V.90 (V.92 models) data modes, the modem can receive data at speeds up to
56 kbps. In V.34 data mode (V.92 and V.34 models), the modem can receive data at
speeds up to 33.6 kbps. In V.32 bis data mode, the modem can receive data at speeds up
to 14.4 kbps.
Data compress (V.44/V.42bis/MNP5) and error correction (V.42/MNP 2-4) modes are
supported to maximize data throughput and data transfer integrity. Non-error-correction
mode is also supported.
Fax Group 3 send and receive rates are supported up to 14.4 kbps with T.30 protocol.
The SmartV.XX modem operates with PSTN telephone lines worldwide.
S models, using the optional CX20442 Voice Codec (VC) in a 32-pin TQFP, support
position independent, full-duplex speakerphone (FDSP) operation using microphone and
speaker, as well as other voice/TAM applications using handset or headset.
102199B
Conexant
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CONEXANT [ CONEXANT SYSTEMS, INC ]
