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.
In addition, unlike the current version of RC224ATL, the new part provides both
data and fax capabilities.
Data modes, controlled by an industry standard 2400 AT command set, can
transmit and receive up to 2400 bps.
Fax modes, controlled by a built-in EIA-578 Class 1 command interface, provide
Group 3 transmit and receive functions.
Distinguishing Features
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Data modes
– CCITT V.22 bis (2400 bps), V.22
(1200 bps)
– Bell 212A (1200 bps) and 103
(300 bps)
– Enhanced AT commands
Group 3 fax modes
– V.29 (9600/7200 bps) transmit
– V.27 ter (4800/2400 bps)
transmit and receive
– V.21 Channel 2 (300 bps)
transmit and receive
EIA-578 Service Class 1 commands
V.42/MNP2-4 and V.42 bis/MNP 5
can be supported through host
software without additional hardware
Data/fax discriminator and auto
answering
Communications software
compatible
Integrated call progress and dialing
No external microcomputer or
memory required
Parallel or serial asynchronous DTE
interface
A/A1 relay control
NVRAM interface allows storage of
two user configurations and four
36-digit dial strings
Automatic adaptive/fixed
compromise equalization
Programmable sleep mode and
wake-up
Full-duplex data mode test
capabilities: Analog loop, local digital
loop, and remote digital loop
Half-duplex fax mode test capabilities
Automatic format/speed sensing
Low power consumption (typical)
– Operating: 100 mW
– Sleep—Idle: 25 mW
– Sleep—Stop: 5 mW
Single +5 V power supply or Dual
+ 3.3 VDD and + 5 VAA power
supplies
Package options:
– 68-pin plastic leaded chip carrier
(PLCC)
– 100-pin plastic quad flat pack
(PQFP)
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Functional Block Diagram
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Modem
Data Pump
Telephone
Line
Interface
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Modem
LED
Indictors
V.24
EIA-232-D
Interface
Modem
Controller
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Optional
NVRAM
Optional
Speaker
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Crystal
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Data Sheet
D224ATLVDSC
March 25, 1999
CONEXANT [ CONEXANT SYSTEMS, INC ]
