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CX20415 Datasheet Preview

CX20415 Datasheet

Single-Chip FaxEngine Codec

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CX20415 pdf
Single-Chip FaxEngine Codec
Integrated Analog Device (CX20415)
The Conexant™ Single-Chip FaxEngine Integrated Analog (IA) device
(CX20415) is packaged in a 32-pin TQFP package and provides the analog
functionality of the modem. It serves as a voice/line codec and line interface
device between the CX9450 DSP and the PSTN. The DSP communicates
with the integrated analog device via a serial interface. The IA has an 8-bit
register that is used to configure the device. This register may be written to or
read from via the serial interface.
Codec
The voice/line codec is a monolithic CMOS integrated circuit operating off a
regulated analog 5V ±10% power supply. It consists of an A/D and D/A
converter path, with digital filtering and analog signal processing circuits to
realize a complete ITU G.714-compatible voice frequency linear
coder/decoder.
The codec is intended as a low power general purpose voice codec and line
interface for applications like fax, telephony, mobile telephony, etc. A block
diagram is shown in Figure 1. The diagram shows the principal functional
sections of the codec and double serial interfaces to the Conexant family of
DSPs.
MICIN +
MICIN -
MicGain[1:0]
LINEIN
LineOEn
LINEO Line
Driver
3rd
Order
LPF
2nd
Order
LPF
LineIEn
Fs Vref
ADC
Decimatio
n
Filter
4th 2nd
order order
LPF HPF
ADCGain
MicEn
Fs FsN 2FsN
Features
Voice/Line Codec
Delta-sigma ADC/DAC with
dynamic range >70 dB
Line input and output for 600
PSTN interface
Differential speaker driver
capable of a 150 load
Single-ended line driver capable
of a 350 load
Differential microphone input
with internal gain and filtering
Analog and digital filtering in
both directions
Input/output mode selection and
control
Power Requirements
Analog power supply: 5 V
Digital power supply: 3.3 V
Package
Codec: 32-pin TQFP
Serial
Interface SOUT
VOX[1:0]
SpkOEn
LineSel[1:0]
SPKRO
+
SPKR
Driver
SPKRO-
RTLoop[1:0]
Fs Vref
DACGain Fs Fs
2FsN
RC
Switched
Capacitor
LPF LPF
DAC
Interpolation
Filter
Serial
Interface
SIN
Fs 2FsN FsN ADCGain DACGain Vref
Analog
Controls
8
Control and Timing Logic
Serial Interface Control
POR CTRLSIN
MCLK
ICLK
FSYNC MODE[1:0]
Figure 1. Integrated Analog Device Block Diagram
Data Sheet
Conexant
Doc. No. 100550B
March 31, 2000



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CX20415 Datasheet Preview

CX20415 Datasheet

Single-Chip FaxEngine Codec

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CX20415 pdf
Single-Chip FaxEngine Codec
Integrated Analog Device (CX20415)
Single-Chip FaxEngine Family Characteristics and Ordering Information
Device Set
Number
Description
Marketing
Abbreviation
DSFE-L400-011 9600 Single-Chip FaxEngine
SCE109
DSFE-L400-001 9600 Single-Chip FaxEngine
with DTAM
SCE109-V
DSFE-L400-021 9600 Single-Chip FaxEngine with SCE109-VS
DTAM and Speakerphone Support
DSFE-L410-001 14400 Single-Chip FaxEngine
SCE114
DSFE-L410-011 14400 Single-Chip FaxEngine
with DTAM
SCE114-V
DSFE-L410-021 14400 Single-Chip FaxEngine with SCE114-VS
DTAM and Speakerphone Support
Single-Chip
FaxEngine
CXD9450-25
CXD9450-24
CXD9450-23
CXD9450-15
CXD9450-14
CXD9450-13
Integrated
Full-Duplex DTAM
Analog Device Speakerphone Support
20415-11 (one)
No
No
20415-11 (one)
No
Yes
20415-11 (two)
Yes
Yes
20415-11 (one)
20415-11 (one)
No
No
No
Yes
20415-11 (two)
Yes
Yes
Revision History
Revision
223DS (100550A)
100550B
Date
08/25/99
03/31/00
Comments
Initial limited release of document
Reformat, new product name, add order info
© 1999, 2000, Conexant Systems, Inc.
All Rights Reserved.
Information in this document is provided in connection with Conexant Systems, Inc. (“Conexant”) products. These materials are provided by
Conexant as a service to its customers and may be used for informational purposes only. Conexant assumes no responsibility for errors or
omissions in these materials. Conexant may make changes to specifications and product descriptions at any time, without notice. Conexant
makes no commitment to update the information and shall have no responsibility whatsoever for conflicts or incompatibilities arising from
future changes to its specifications and product descriptions.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in
Conexant’s Terms and Conditions of Sale for such products, Conexant assumes no liability whatsoever.
THESE MATERIALS ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, RELATING TO
SALE AND/OR USE OF CONEXANT PRODUCTS INCLUDING LIABILITY OR WARRANTIES RELATING TO FITNESS FOR A
PARTICULAR PURPOSE, CONSEQUENTIAL OR INCIDENTAL DAMAGES, MERCHANTABILITY, OR INFRINGEMENT OF ANY PATENT,
COPYRIGHT OR OTHER INTELLECTUAL PROPERTY RIGHT. CONEXANT FURTHER DOES NOT WARRANT THE ACCURACY OR
COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS.
CONEXANT SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, INCLUDING
WITHOUT LIMITATION, LOST REVENUES OR LOST PROFITS, WHICH MAY RESULT FROM THE USE OF THESE MATERIALS.
Conexant products are not intended for use in medical, lifesaving or life sustaining applications. Conexant customers using or selling
Conexant products for use in such applications do so at their own risk and agree to fully indemnify Conexant for any damages resulting from
such improper use or sale.
The following are trademarks of Conexant Systems, Inc.: Conexant™, the Conexant C symbol, and “What’s Next in Communications
Technologies”™. Product names or services listed in this publication are for identification purposes only, and may be trademarks of third
parties. Third-party brands and names are the property of their respective owners.
For additional disclaimer information, please consult Conexant’s Legal Information posted at www.conexant.com, which is incorporated by
reference.
Reader Response: Conexant strives to produce quality documentation and welcomes your feedback. Please
send comments and suggestions to tech.pubs@conexant.com. For technical questions, contact your local
Conexant sales office or field applications engineer.
2
Conexant
100550B


Part Number CX20415
Description Single-Chip FaxEngine Codec
Maker Conexant
Total Page 8 Pages
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