Data Sheet (Preliminary)

Conexant Proprietary Information

Doc. No.100444A

December 21, 1999

SmartACFL







 Modem

V.90/K56flex

/V.34/V.32bis Modem Device Sets with Microcontroller (L2702),

Modem Data Pump (P9373), SmartDAA

 (20463), and Optional Voice Codec (20437)

for Low Power Applications

The Conexant

 SmartACFL V.90/K56flex Modem Device Set with SmartDAA

technology supports analog data up to 56 Kbps, analog fax to 14.4 Kbps,

telephone answering machine (TAM), V.80 synchronous access mode, on-

board DSVD, voice/speakerphone (optional), and cellular/GSM operation.

Serial, parallel, or PC Card host interface operation is supported depending on

the selected model (Table 1).

The modem supports ITU-T V.90/K56flex

, V.34 and V.32bis data

modulations and is designed to operate with dial-up telephone lines in the U.S.

and worldwide. PC Card and parallel host interface models also support analog

cellular direct connect and GSM direct connect. Low profile, small TQFP

packages and low voltage operation with low power consumption make this

device set ideal for laptop, notebook, and palmtop applications using the

parallel host or serial DTE interface with the MCU, or the PC Card interface

with the MCUP.

The SmartACFL device set consists of a Microcontroller (MCU or MCUP) in a

128-pin TQFP, a Modem Data Pump (MDP) in a 100-pin TQFP, and a Line

Side Device (LSD) (SmartDAA device) in a 32-pin TQFP. The optional Voice

Codec (VC), in a 32-pin TQFP, supports voice/full-duplex speakerphone

(FDSP) operation with interfaces to a microphone and speaker and to a

telephone handset/headset. Figure 1 identifies the major hardware signal

interfaces. The MCUP supports two peripheral channels, one channel for the

modem and a second channel for an optional user-defined function

(Function 2).

Conexant's SmartDAA technology (patent pending) eliminates the need for a

costly line transformer, relays, and opto-isolators typically used in discrete DAA

(Data Access Arrangement) implementations. The SmartDAA architecture also

simplifies product implementation by eliminating the need for country-specific

components enabling worldwide homologation of a single modem board design

and a single bill of materials (BOM).

The SmartDAA system-powered DAA operates reliably without drawing power

from the line, unlike line-powered DAAs that operate poorly when line current is

insufficient due to long lines or poor line conditions. Enhanced features, such

as monitoring of local extension status without going off-hook, are also

supported.

Incorporating Conexant’s proprietary Digital Isolation Barrier (DIB) design

(patent pending) and other innovative DAA features, the SmartDAA

architecture simplifies application design, minimizes layout area, and reduces

component cost.

Features

• V.90 data/V.17 fax modem

• SmartDAA technology

− System side powered DAA operates

under poor line current supply

conditions

− Wake-on-ring

− Ring detection

− Line polarity reversal detection

− Line current loss detection

− Pulse dialing

− Call waiting detection

− Digital PBX line protection

− Meets world-wide DC VI Masks

requirements

− Caller ID detection

• Data/Fax/Voice call discrimination

• Hardware-based modem controller

• Hardware-based digital signal

processor (DSP)

• Voice/full-duplex speakerphone mode

(S models)

• V.70 DSVD using optional RCDSVD

SCP (S models)

• World-wide operation

• Industry standard communication

commands

• Selectable parallel/serial interface with

speeds up to 230.4 kbps

− Parallel 16550A UART-compatible

interface

− Serial ITU-T V.24 (EIA/TIA-232-E)

• V.80 synchronous access mode

• Direct mode (serial interface)

• Synchronous data mode

(serial interface)

• V.22 bis fast connect

• Analog cellular direct connect

• GSM direct connect

• Sleep mode

• Thin packages support low profile

designs

• +3.3V operation with +5V tolerant

digital inputs