CMX865A Datasheet | CML

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 TX USART FSK MODULATOR .. TONE / DTMF GENERATOR RX USART FSK RECEIVER TONE / DTMF DETECTOR LINE LINE INTERFACE 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 ponents 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 patible 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 Tele Signalling Device CONTENTS Section 1. 2. 3. 4. Brief Description 1 Block Diagram 3 Signal List...