Description
●The MT8888C is a monolithic DTMF transceiver with call progress filter. It is fabricated in CMOS
●technology offering low power consumption and high reliability.
●The receiver section is based upon the industry standard MT8870 DTMF receiver while the
●transmitter utilizes a switched capacitor D/A converter for low distortion, high accuracy DTMF
●signalling. Internal counters provide a burst mode such that tone bursts can be transmitted with precise timing. A call progress filter can be selected allowing a microprocessor to analyze call progress tones.
●Features
●• Central office quality DTMF transmitter/receiver
●• Low power consumption
●• High speed Intel micro interface
●• Adjustable guard time
●• Automatic tone burst mode
●• Call progress tone detection to -30dBm
●Applications
●• Credit card systems
●• Paging systems
●• Repeater systems/mobile radio
●• Interconnect dialers
●• Personal computers
