http://www.datasheet4u.com

900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf





CML
CML

CMX865A Datasheet Preview

CMX865A Datasheet

DTMF Codec

No Preview Available !

CMX865A pdf
CMX865A
Telecom Signalling
Device
D/865A/3 February 2007
Provisional Issue
CMX865A – DTMF CODEC AND TELECOM SIGNALLING COMBO
Features
V.23 1200/75, 1200/1200, 75, 1200 bps FSK
Bell 202 1200/150, 1200/1200, 150, 1200 bps FSK
V.21 or Bell 103 300/300 bps FSK
Low Voice Falsing DTMF Decoder
DTMF/Tones Transmit and Receive
Low Power - High Performance
Applications
Wireless Local Loops
SMS Phones
Security Systems
Remote Utility Meter Reading
Industrial Control Systems
Pay-Phones
Set-Top Boxes
LINE
LINE
INTERFACE
CMX865A
TX USART
FSK MODULATOR
TONE / DTMF GENEwRwAw.TDaOtaRSheet4U.com
RX USART
FSK RECEIVER
TONE / DTMF DETECTOR
C-BUS
SERIAL
INTERFACE
HOST
µC
1. Brief Description
The CMX865A is a multi-standard modem for use in Wireless Local Loop, Short Message Service
telephone based information and telemetry systems. Flexible line driver, hybrid and receiver circuits are
integrated on chip, requiring only passive external components to build a 2 or 4-wire line interface.
A high-quality DTMF decoder with excellent immunity to falsing on voice and a standard DTMF encoder
are included. Alternatively, these blocks can be used to transmit and detect user-specific, programmed
single and dual-tone signals, simple melodies, call progress signals or modem calling and answering
tones.
Host control and data transfer is via a high-speed serial bus that operates in normal and Powersave
modes and which is compatible with most simple types of µC serial interface. An embedded USART
allows multi-format asynchronous data and unformatted synchronous data to be received or transmitted
as 8-bit bytes.
The CMX865A operates from a single 3.0V to 3.6V supply over a temperature range of -40°C to +85°C
and is available in 16-pin SOIC (D4) and 16-pin TSSOP (E4) packages.
© 2007 CML Microsystems Plc



CML
CML

CMX865A Datasheet Preview

CMX865A Datasheet

DTMF Codec

No Preview Available !

CMX865A pdf
Telecom Signalling Device
CMX865A
Section
CONTENTS
1. Brief Description ..................................................................................... 1
2. Block Diagram ......................................................................................... 3
3. Signal List ................................................................................................ 4
4. External Components............................................................................. 5
4.1. Line Interface (DAA) .................................................................... 6
4.1.1. 2-Wire Line Interface....................................................... 6
4.1.2. 4-Wire Line Interface....................................................... 7
4.1.3. Wireless Local Loop Interface ........................................ 8
5. General Description................................................................................ 9
5.1. Tx USART .................................................................................. 10
5.2. FSK Modulator ........................................................................... 11
5.3. Tx Filter and Equaliser ............................................................... 11
5.4. DTMF/Tone Generator............................................................... 11
5.5. Tx Level Control and Output Buffer ........................................... 11
5.6. Rx DTMF/Tones Detectors ........................................................ 12
5.7. Rx Modem Filtering and Demodulation ..................................... 13
5.8. Rx Modem Pattern Detectors .................................................... 14
5.9. Rx Data Register and USART ................................................... 14
5.10. C-BUS Interface......................................................................... 15
5.10.1. General Reswewtw.DCatoaSmheemt4Ua.conmd ............................................. 17
5.10.2. General Control Register .............................................. 17
5.10.3. Transmit Mode Register ............................................... 19
5.10.4. Receive Mode Register ................................................ 22
5.10.5. Tx Data Register ........................................................... 24
5.10.6. Rx Data Register........................................................... 24
5.10.7. Status Register ............................................................. 25
5.10.8. Programming Register .................................................. 28
6. Application Notes ................................................................................. 31
7. Performance Specification................................................................... 32
7.1. Electrical Performance............................................................... 32
7.1.1. Absolute Maximum Ratings .......................................... 32
7.1.2. Operating Limits............................................................ 32
7.1.3. Operating Characteristics ............................................. 33
7.2. Packaging .................................................................................. 40
Page
Table
Page
Table 1 Status Register ................................................................................................................ 25
Table 2 Received DTMF Code: Status Register b3-0 .................................................................. 27
Table 3 Programming Register: Filter Coefficients ....................................................................... 30
It is always recommended that you check for the latest product datasheet version from the
Datasheets page of the CML website: [www.cmlmicro.com].
© 2007 CML Microsystems Plc
2
D/865A/3


Part Number CMX865A
Description DTMF Codec
Maker CML
Total Page 30 Pages
PDF Download
CMX865A pdf
CMX865A Datasheet PDF
[partsNo] view html
View PDF for Mobile








Similar Datasheet

1 CMX865 FSK Modem and DTMF Codec CML
CML
CMX865 pdf
2 CMX865A DTMF Codec CML
CML
CMX865A pdf





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy