MX867D2 데이터 시트보기 (PDF) - MX-COM Inc

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MX867D2

Low Power V.22 Modem

MX-COM Inc  

COMMUNICATION ICs

DATA BULLETIN

CMX867

Low Power

V.22 Modem

ADVANCE INFORMATION

Features

• V.22, Bell 212A 1200/1200 or 600/600bps DPSK

• V.23 1200/75, 1200/1200, 75, 1200bps FSK

• Bell 202 1200/150, 1200/1200, 150, 1200bps FSK

• V.21 or Bell 103 300/300bps FSK

• DTMF/Tones Transmit and Receive

• Extremely Low Power: 3.5mA/3V, 6.5mA/5V typ.

• Powersave Standby Mode

• Upward Compatible to CMX868 2400bps V.22bis

Modem

Applications

• Phone Line Powered Devices

• Payphones

• Remote Utility Meter Reading

• POS Terminals

• Cable TV Set Top Box (STB)

• Telephone Telemetry Systems

• Security Systems

• Industrial Control Systems

• Modem Links with Caller ID

LINE

LINE

INTERFACE

TX USART & SCRAMBLER.

DPSK / FSK MODULATOR.

TONE / DTMF GENERATOR.

RX DESCRAMBLER & USART,

DPSK / FSK RECEIVER.

TONE / DTMF DETECTOR.

RING DETECTOR.

RELAY DRIVER.

CMX867

C-BUS

SERIAL

INTERFACE

HOST

µC

The CMX867 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 interfaces.

The data transmitted and received by the modem is also transferred over the same serial bus. On-chip

programmable Tx and Rx USARTs meeting the requirements of V.14 are provided for use with asynchronous

data and allow unformatted synchronous data to be received or transmitted as 8-bit words.

The CMX867 can transmit and detect standard DTMF and modem calling and answer signals or user-specific

programmed single or dual tone signals. A general purpose Call Progress signal detector is also included.

Flexible line driver and receive hybrid circuits are integrated on chip, requiring only passive external

components to create 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 CMX867 operates from a single 2.7 to 5.5V supply over a temperature range of -40°C to +85°C and is

available in 24-pin TSSOP, SOIC and DIP packages.

2000 MX-COM, Inc.

www.mxcom.com tel: 800 638 5577 336 744 5050 fax: 336 744 5054

Doc. # 20480219.001

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

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

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