ds22-l100-041 Conexant Systems, Inc., ds22-l100-041 Datasheet - Page 7

• Manufacturer Part Number: ds22-l100-041
• Description: Cx84100-41/-23 Scxv.22bis Modem V.22bis Modem With Cx20493 Smartdaa? Line Side Device
• Manufacturer: Conexant Systems, Inc.

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102339C
Introduction
Overview
The Conexant CX84100-41/-23 SCXV.22bis modem supports up to V.22bis data
modem operation with V.42 and MNP 4 error correction and V.42 bis data compression
over a serial host interface. Major hardware interfaces and signal interfaces are illustrated
in Figure 1-1 and Figure 1-2, respectively.
Conexant’s SmartDAA technology (patent pending) eliminates the need for a costly
analog transformer, relays, and opto-isolators typically used in discrete DAA
implementation of country-specific modem configurations thereby reducing system
solution cost to a single bill of materials (BOM).
The SmartDAA system-powered DAA operates reliably without drawing power from the
line, unlike line-powered DAAs, which 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.
The SCXV.22bis Modem device set, consisting of a CX84100 V.22bis Modem in a 28-
pin TSSOP package and a CX20493 SmartDAA Line Side Device (LSD) in either a 28-
pin Quad Flat No-lead (QFN) package or a 32-pin Low Profile Quad Pack (LQFP)
package, supports data operation with hardware-based modem controller, digital signal
processing, and DAA/telephone line interface functions.
The CX84100 V.22bis Modem integrates microcontroller (MCU), serial host interface,
ROM code, RAM, and SmartDAA system side device (SSD) functions onto a single die.
Small, low profile packages, low voltage operation, and low power consumption make
this device set an ideal V.22bis solution for embedded applications.
Although the modem operates by executing a mask code from internal ROM and RAM, a
country profile can be added or modified via host upload to the modem internal RAM.
In V.22 fast connect mode, the modem can connect at 1200 bps with a very short training
time, which is very efficient for small data transfers. Also, V.80 synchronous access
mode supports host-controlled communication protocols.
This data sheet describes the modem capabilities. Commands and parameters are defined
in the Commands Reference Manual (Doc. No. 102338).
CX84100-41/-23 SCXV.22bis Modem Data Sheet
Conexant
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