r6781-12 Conexant Systems, Inc., r6781-12 Datasheet

r6781-12

Manufacturer Part Number

r6781-12

Description

Embedded Modem Family

Manufacturer

Conexant Systems, Inc.

Datasheet

1.R6781-12.pdf (104 pages)

Current page: 1 of 104
Download datasheet (730Kb)

RC224ATL/224ATLV

EmbeddedModem Family

The new Conexant RC224ATL utilizes a new integrated data pump/controller to allow

the device to directly connect to host processors that are 3.3 V I/O capable. The codec

used in the new part is the same as the codec used in the existing RC224ATL. The

new device is form, fit, and function compatible with the existing device. This means

there are no hardware and software differences between the existing and the new part,

with one exception. The 3.3 V I/O capable part incorporates 3.3 V compatible digital

I/O buffers, hence requiring 3.3 V digital supply instead of 5 V digital supply.

data and fax capabilities.

transmit and receive up to 2400 bps.

Group 3 transmit and receive functions.

Functional Block Diagram

Data Sheet

In addition, unlike the current version of RC224ATL, the new part provides both

Data modes, controlled by an industry standard 2400 AT command set, can

Fax modes, controlled by a built-in EIA-578 Class 1 command interface, provide

EIA-232-D

Interface

V.24

Data Pump

Controller

Modem

Crystal

Telephone

Interface

Indictors

Optional

Speaker

Modem

NVRAM

LED

Line

Distinguishing Features

• Data modes

• Group 3 fax modes

• EIA-578 Service Class 1 commands

• V.42/MNP2-4 and V.42 bis/MNP 5

• Data/fax discriminator and auto

• Communications software

• Integrated call progress and dialing

• No external microcomputer or

• Parallel or serial asynchronous DTE

• A/A1 relay control

• NVRAM interface allows storage of

• Automatic adaptive/fixed

• Programmable sleep mode and

• Full-duplex data mode test

• Half-duplex fax mode test capabilities

• Automatic format/speed sensing

• Low power consumption (typical)

• Single +5 V power supply or Dual

• Package options:

– CCITT V.22 bis (2400 bps), V.22

– Bell 212A (1200 bps) and 103

– Enhanced AT commands

– V.29 (9600/7200 bps) transmit

– V.27 ter (4800/2400 bps)

– V.21 Channel 2 (300 bps)

can be supported through host

software without additional hardware

answering

compatible

memory required

interface

two user configurations and four

36-digit dial strings

compromise equalization

wake-up

capabilities: Analog loop, local digital

loop, and remote digital loop

– Operating: 100 mW

– Sleep—Idle: 25 mW

– Sleep—Stop: 5 mW

+ 3.3 VDD and + 5 VAA power

supplies

– 68-pin plastic leaded chip carrier

– 100-pin plastic quad flat pack

(1200 bps)

(300 bps)

transmit and receive

(PLCC)

(PQFP)

March 25, 1999

D224ATLVDSC

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