CMX615

Features:

Pre-Programmed Tone Generators
Fully Integrated DTMF Encoder 
SPM Generator 
Simple Serial Control Interface 
'Zero-Power' (1µA) Standby Mode
3.58MHz Xtal/Clock 
V23/Bell 202 FSK Generator 
Digital Ringing Voltage Generator


Application

Digital Line to POTS Interface
Subscriber Terminal Adapters
Wireless Local Loop
Computer Telephony Integration
Telephone/Radio Patch Systems
Pair Gain Systems
Billing/SPM Systems


Specifications




Description

The CMX615 is an integrated telecom tone generator and DTMF encoder designed for ISDN interfaces, Wireless Local Loop and Analogue to Digital Phone Conversion systems. The tone generator CMX615 covers an extensive range of pre-programmed tones used in analogue phone systems (POTS). Three outputs are provided: 'Ringing signals', 'In-band tones or FSK data', and '12kHz/16kHz Metering pulses'. Simple software control facilitates the interface to a wide range of commonly used µCs and SLICs, enabling a comprehensive analogue telephone line presentation.
The DTMF encoder CMX615 generates the appropriate DTMF tones for the POTS interface. DTMF tone pairs can be encoded along with each tone singly or with other dual tone signals, such as those used in CIDCW systems and 'On Hook' signalling systems.
Other tone standards supported are: Fax and Modem 'answer' and 'originate', ITU (CCITT) 'R1' and 'R2'
signals, and sufficient tones for simple melody generation. Communication to and from the host µController is
performed by a 'C-BUS' serial interface, which is compatible with the 'SPI' interface.