CX20493-25 datasheet, PDF - EEWORLD Datasheet

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CX20493-25: DescriptionModem-Support Circuit, 2.4kbps Data, CMOS, QFN-28; CategoryWireless rf/communication Telecom circuit; File Size549KB，56 Pages; ManufacturerCONEXANT; Websitehttp://www.conexant.com/

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CX20493-25 Overview

Modem-Support Circuit, 2.4kbps Data, CMOS, QFN-28

CX20493-25 Parametric

Parameter Name	Attribute value
Is it lead-free?	Contains lead
Is it Rohs certified?	incompatible
Maker	CONEXANT
Parts packaging code	QFN
package instruction	LQFP, QFP32,.35SQ,32
Contacts	28
Reach Compliance Code	compliant
data rate	2.4 Mbps
JESD-30 code	S-XQFP-G32
JESD-609 code	e0
length	7 mm
Number of functions	1
Number of terminals	32
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	UNSPECIFIED
encapsulated code	LQFP
Encapsulate equivalent code	QFP32,.35SQ,32
Package shape	SQUARE
Package form	FLATPACK, LOW PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
power supply	3.3 V
Certification status	Not Qualified
Maximum seat height	1.6 mm
Nominal supply voltage	3.3 V
surface mount	YES
technology	CMOS
Telecom integrated circuit types	MODEM-SUPPORT CIRCUIT
Temperature level	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)
Terminal form	GULL WING
Terminal pitch	0.8 mm
Terminal location	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED
width	7 mm

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CX84100-41/-23 SCXV.22bis Modem

V.22bis Modem with CX20493 SmartDAA®

Line Side Device

Data Sheet

Doc. No. 102339D

January 17, 2012

CX84100-41/-23 SCXV.22bis Modem Data Sheet

Revision Record

Revision

Date

1/17/2012

3/3/2004

12/9/2003

12/3/2003

Comments

Rev. D release.

Rev. C release.

Rev. B release.

Initial release.

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® and the Conexant C symbol, and SmartDAA®. 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.

Conexant

102339D

CX84100-41/-23 SCXV.22bis Modem Data Sheet

Contents

1. Introduction .......................................................................................................................... 1-1

1.1

Overview ................................................................................................................................................... 1-1

1.2

Features .................................................................................................................................................... 1-3

1.2.1

SmartDAA Features .................................................................................................................... 1-4

1.2.2

Applications ................................................................................................................................ 1-4

1.3

Technical Overview ................................................................................................................................... 1-5

1.3.1

General Description .................................................................................................................... 1-5

1.3.2

MCU............................................................................................................................................ 1-5

1.3.3

Operating Modes ........................................................................................................................ 1-5

1.3.3.1

Data Modes ............................................................................................................... 1-5

1.3.3.2

Worldwide Operation................................................................................................. 1-5

1.3.4

Reference Design ....................................................................................................................... 1-6

1.4

Hardware Description................................................................................................................................ 1-7

1.4.1

CX84100 V.22bis Modem ........................................................................................................... 1-7

1.4.2

Digital Isolation Barrier ................................................................................................................ 1-7

1.4.3

CX20493 SmartDAA Line Side Device ....................................................................................... 1-7

1.5

Commands ................................................................................................................................................ 1-8

2. Technical Specifications....................................................................................................... 2-1

2.1

Serial DTE Interface Operation ................................................................................................................. 2-1

2.1.1

Automatic Speed/Format Sensing .............................................................................................. 2-1

2.2

Establishing Data Modem Connections .................................................................................................... 2-2

2.2.1

Dialing ......................................................................................................................................... 2-2

2.2.2

Modem Handshaking Protocol ....................................................................................................2-2

2.2.3

Call Progress Tone Detection ..................................................................................................... 2-2

2.2.4

Answer Tone Detection............................................................................................................... 2-2

2.2.5

Ring Detection ............................................................................................................................ 2-2

2.2.6

Billing Protection ......................................................................................................................... 2-2

2.2.7

Connection Speeds .................................................................................................................... 2-2

2.2.8

Automode ................................................................................................................................... 2-3

2.3

Data Mode ................................................................................................................................................ 2-3

2.3.1

Speed Buffering (Normal Mode) .................................................................................................2-3

2.3.2

Flow Control................................................................................................................................ 2-3

2.3.3

Direct Mode ................................................................................................................................ 2-3

2.3.4

Escape Sequence Detection....................................................................................................... 2-4

2.3.5

Telephone Line Monitoring ......................................................................................................... 2-4

2.3.6

Retrain ........................................................................................................................................ 2-4

2.3.7

Programmable Inactivity Timer ................................................................................................... 2-4

2.3.8

DTE Signal Monitoring (Serial DTE Interface Only) .................................................................... 2-4

2.4

Error Correction and Data Compression ................................................................................................... 2-4

2.4.1

V.42 Error Correction .................................................................................................................. 2-4

2.4.2

MNP 2-4 Error Correction ........................................................................................................... 2-4

102339D

Conexant

iii

CX84100-41/-23 SCXV.22bis Modem Data Sheet

2.4.3

V.42 bis Data Compression ........................................................................................................ 2-5

Telephony Extensions ............................................................................................................................... 2-5

2.5.1

Line In Use Detection.................................................................................................................. 2-5

2.5.2

Extension Pickup Detection ........................................................................................................ 2-5

2.5.3

Remote Hangup Detection.......................................................................................................... 2-5

2.5.4

Digital Line Protection ................................................................................................................. 2-5

Caller ID .................................................................................................................................................... 2-6

2.6.1

Type II CID.................................................................................................................................. 2-6

Worldwide Country Support ...................................................................................................................... 2-6

Diagnostics ............................................................................................................................................... 2-7

2.8.1

Commanded Tests ..................................................................................................................... 2-7

Low Power Mode ...................................................................................................................................... 2-7

2.5

2.6

2.7

2.8

2.9

3. Hardware Interface............................................................................................................... 3-1

3.1

CX84100 V.22bis Modem Hardware Pins and Signals ............................................................................. 3-1

3.1.1

CX84100 V.22bis Modem Signal Summary ................................................................................ 3-1

3.1.1.1

CX20493 LSD Interface (Through DIB) ..................................................................... 3-1

3.1.1.2

Call Progress Speaker Interface ............................................................................... 3-1

3.1.1.3

Serial DTE Interface and Indicator Outputs ............................................................... 3-1

3.1.1.4

Control and Signals ................................................................................................... 3-1

3.1.1.5

Crystal/Clock and Power Signals .............................................................................. 3-2

3.1.2

CX84100 V.22bis Modem Pin Assignments and Signal Definitions ............................................ 3-2

3.2

CX20493 LSD 28-Pin QFN Hardware Pins and Signals ........................................................................... 3-8

3.2.1

CX20493 LSD 28-Pin QFN Signal Summary .............................................................................. 3-8

3.2.1.1

CX84100 V.22bis Modem Interface (Through DIB) ................................................... 3-8

3.2.1.2

Telephone Line Interface .......................................................................................... 3-8

3.2.1.3

Voltage References................................................................................................... 3-8

3.2.1.4

General Purpose Input/Output .................................................................................. 3-9

3.2.1.5

No Connects ............................................................................................................. 3-9

3.2.2

CX20493 LSD 28-Pin QFN Pin Assignments and Signal Definitions .......................................... 3-9

3.3

CX20493 LSD 32-Pin LQFP Hardware Pins and Signals ....................................................................... 3-13

3.3.1

CX20493 LSD 32-Pin LQFP Signal Summary .......................................................................... 3-13

3.3.1.1

CX84100 Interface (Through DIB)........................................................................... 3-13

3.3.1.2

Telephone Line Interface ........................................................................................ 3-13

3.3.1.3

Voltage References................................................................................................. 3-13

3.3.1.4

General Purpose Input/Output ................................................................................ 3-14

3.3.1.5

No Connects ...........................................................................................................3-14

3.3.2

CX20493 LSD 32-Pin LQFP Pin Assignments and Signal Definitions ...................................... 3-14

3.4

CX20493 LSD GPIO DC Electrical Characteristics ................................................................................. 3-18

3.5

Electrical and Environmental Specifications ............................................................................................ 3-19

3.5.1

Operating Conditions, Absolute Maximum Ratings, and Power Requirements ........................ 3-19

3.6

Interface Timing and Waveforms ............................................................................................................ 3-21

3.6.1.1

Serial DTE Interface ................................................................................................ 3-21

3.7

Crystal Specifications .............................................................................................................................. 3-22

4. Package Dimensions ........................................................................................................... 4-1

Conexant

102339D

CX20493-25 Related Products

	CX20493-25	CX20493-35
Description	Modem-Support Circuit, 2.4kbps Data, CMOS, QFN-28	Modem-Support Circuit, 2.4kbps Data, CMOS, QFN-28
Is it lead-free?	Contains lead	Contains lead
Is it Rohs certified?	incompatible	incompatible
Maker	CONEXANT	CONEXANT
Parts packaging code	QFN	QFN
package instruction	LQFP, QFP32,.35SQ,32	LQFP, QFP32,.35SQ,32
Contacts	28	28
Reach Compliance Code	compliant	compliant
data rate	2.4 Mbps	2.4 Mbps
JESD-30 code	S-XQFP-G32	S-XQFP-G32
JESD-609 code	e0	e0
length	7 mm	7 mm
Number of functions	1	1
Number of terminals	32	32
Maximum operating temperature	70 °C	70 °C
Package body material	UNSPECIFIED	UNSPECIFIED
encapsulated code	LQFP	LQFP
Encapsulate equivalent code	QFP32,.35SQ,32	QFP32,.35SQ,32
Package shape	SQUARE	SQUARE
Package form	FLATPACK, LOW PROFILE	FLATPACK, LOW PROFILE
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	NOT SPECIFIED
power supply	3.3 V	3.3 V
Certification status	Not Qualified	Not Qualified
Maximum seat height	1.6 mm	1.6 mm
Nominal supply voltage	3.3 V	3.3 V
surface mount	YES	YES
technology	CMOS	CMOS
Telecom integrated circuit types	MODEM-SUPPORT CIRCUIT	MODEM-SUPPORT CIRCUIT
Temperature level	COMMERCIAL	COMMERCIAL
Terminal surface	Tin/Lead (Sn/Pb)	Tin/Lead (Sn/Pb)
Terminal form	GULL WING	GULL WING
Terminal pitch	0.8 mm	0.8 mm
Terminal location	QUAD	QUAD
Maximum time at peak reflow temperature	NOT SPECIFIED	NOT SPECIFIED
width	7 mm	7 mm

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