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CMX865D2

Description
FSK Modem and DTMF Codec
CategoryWireless rf/communication    Telecom circuit   
File Size1MB,42 Pages
ManufacturerCML Microcircuits
Websitehttp://www.cmlmicro.com/
Environmental Compliance
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CMX865D2 Overview

FSK Modem and DTMF Codec

CMX865D2 Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
Parts packaging codeSOIC
package instructionSOP,
Contacts24
Reach Compliance Codecompli
JESD-30 codeR-PDSO-G24
JESD-609 codee3
length15.365 mm
Number of functions1
Number of terminals24
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)NOT SPECIFIED
Certification statusNot Qualified
Maximum seat height2.67 mm
Nominal supply voltage3.3 V
surface mountYES
Telecom integrated circuit typesMODEM
Temperature levelINDUSTRIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width7.425 mm
Base Number Matches1
CML Microcircuits
COMMUNICATION SEMICONDUCTORS
D/865/3 November 2005
CMX865
FSK Modem and
DTMF Codec
Provisional Issue
Features
V.23 1200/75, 1200/1200, 75, 1200 bps FSK
Bell 202 1200/150, 1200/1200, 150, 1200 bps FSK
Bell 103 300/300 bps FSK
Low Voice Falsing DTMF Decoder
DTMF/Tones Transmit and Receive
Low Power - High Performance
Software and Hardware Compatible with CMX86x
Family of Wireline Products
Applications
Wireless Local Loops
SMS Phones
Security Systems
Remote Utility Meter Reading
Industrial Control Systems
Pay-Phones
Set-Top Boxes
1.
Brief Description
The CMX865 is a multi-standard modem for use in telephone based information and telemetry systems.
Control of the device is via a simple high speed serial bus, compatible with most types of µC serial
interface. The data transmitted and received by the modem is also transferred over the same serial bus.
On-chip programmable Tx and Rx USARTs are provided for use with asynchronous data and allow
unformatted synchronous data to be received or transmitted as 8-bit words.
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, call progress signals or modem calling and answering tones.
Flexible line driver and receive hybrid circuits are integrated on chip, requiring only passive external
components to build a 2 or 4-wire line interface.
The device also features a Hook Switch Relay Drive output and a Ring Detector circuit which continues to
function when the device is in the powersave mode, providing an interrupt which can be used to wake up
the host µController when line voltage reversal or ringing is detected.
The CMX865 operates from a single 3.0 to 3.6V supply over a temperature range of -40°C to +85°C and
is available in a 24-pin SOIC package.
©
2005 CML Microsystems Plc

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