CMX635

Features:

· S/T Interface to ITU-T I.430 (TE & NT1)
· 2B + 1D-channel HDLC Controllers
· IOM™-2 / GCI Interface
· Selectable A-Law/µ-Law PCM Codec
· 100mW Speaker-Phone Output
· 2 Independent Analogue Inputs
· Pre-Programmed Tone Generators
· V.23/Bell 202 FSK Generator
· Ringing Signal and SPM Generators
· DTMF Encoder/Decoder




Application

` ISDN Terminal Equipment
` ISDN Intelligent NT's
` ISDN Phones and Feature Phones
` Digital & Analogue Answer-Phones
` Data Adaptors
` Active and Passive Terminal Adaptors
` Alarm Systems
` Point-Of-Sale Terminals
` 'Group 4' Fax Equipment
` Video Phones




Description

The CMX635 is an integrated Subscriber Processor designed for low chip-count ISDN voice/data terminals and POTS terminal adaptors. Its functions facilitate operation in an ISDN feature phone with speakerphone capability or in a POTS terminal adapter with Subscriber Pulse Metering (SPM), DTMF encoder/decoder, Caller Line ID (CLID) and Caller ID on Call Waiting (CIDCW) capabilities. It also implements many functions needed in an intelligent NT or NT1Plus system.
The CMX635 incorporates a 4-wire ST interface conforming to ITU-T I.430 and ETS 300 012-1 specifications. HDLC Controllers and associated FIFOs are provided for B1, B2 and D-channels, which can be configured to automatically process the bit stuffing, flag generation/recognition, address matching and CRC generation/checking required to support the ITU Q.921 protocol. An IOM-2TM /GCI interface is provided to enable operation with other IOM compliant devices.
The mController interface is compatible with multiplexed and non-multiplexed address/data busses and generic Motorola and Intel style control. The CMX635 will automatically detect which style of interface is being used and configure itself accordingly. The device is available in a 48- pin TQFP package and has progressive powersave modes to aid low power operation.