CMX624P4 Ver la hoja de datos (PDF) - MX-COM Inc

Número de pieza

componentes Descripción

Lista de partido

CMX624P4

Bell 202 and V.23 Modem with Call Progress and DTMF

MX-COM Inc  

DATA BULLETIN

CMX624 Bell 202 and V.23 Modem

with Call Progress and DTMF

PRELIMINARY INFORMATION

Features

• Bell 202 and V.23 Compatible Modem

• 1200bps Full duplex Operation (2 or 4 Wire)

• Software Adjustable Tx and Rx Levels

• Programmable Group Delay Equalizer

• Answer/Originate Tone Generator/Detector

• Call Progress Tone Detection

• Integrated DTMF Encoder

• Line Reversal and Ring Detector

• Simple Serial Control Interface

• Hook Switch Relay Driver

• Zero-Power Standby Mode

• 3.0 to 5.0V Operation

Applications

• Telephone Telemetry Systems

• Remote Utility Meter Reading

• Security Systems

• Payphones

• Cable-TV Set Top Boxes

• Industrial Control Systems

• Electronic Cash Terminals

• Vending Machines

IRQ

CS

µC CLK

RXD

TXD

Serial

Interface

+

Tx/Rx Data

UART

Ring & Line

Reversal Detect

Call Progress

and

Data Detect

FSK

De-modulator

Xtal Osc and

Clock Dividers

Receive

Filter and

Equalizer

FSK/DTMF

Modulator

Transmit

Filter

VBIAS

RT

RD

XTAL/CLK

XTAL

RX-

RX+

RXAMPOUT

TXIN-

TX+

Passive

Hybrid

Network

2 or 4

Wire Line

TX-

TX

RLYDRV

The CMX624 Bell 202 and V.23 modem provides full duplex 1200bps data signaling suitable for telephone

based information and telemetry systems where low power operation is desired. Bell 202 and V.23 signaling

delivers fast call set up times and robust, error resistant, transmission in 2 or 4 wire line circuits. A rich set of

important additional functions enhances end product value while reducing size. These include: integrated

DTMF encoder for dial out functions, single tone encoder for ‘melody’ generation, answer tone

generator/detector, line reversal and ring detector for ‘waking’ up a sleeping µC, adjustable Tx and Rx gain,

and a low impedance pull down output for hook relay control. The addition of the answer tone

generator/detector and call progress tone detector makes the set-up of a telephone call much easier for the

host µC to accomplish.

Very low power telemetry and data collection applications are supported by the CMX624’s ‘Zero Power’

standby mode in which the device will detect telephone line ringing voltage or line voltage reversal events.

Pin compatible with the CMX644A Bell212A / V.22 modem, the CMX624 is available in the following

packages: 24-pin SSOP (CMX624D5), 24-pin SOIC (CMX624D2), and 24-pin PDIP (CMX624P4).

©1999 MX-COM, Inc.

www.mxcom.com Tel: 800 638 5577 336 744 5050 Fax: 336 744 5054

Doc. # 20480180.108

4800 Bethania Station Road, Winston-Salem, NC 27105-1201 USA

All trademarks and service marks are held by their respective companies.

Share Link: