MT8888CSR1 Datasheet

Interface - Telecom


The MT8888CSR1 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. The MT8888CSR1 utilizes an Intel micro interface, which allows the device to be connected to a number of popular microcontrollers with minimal external logic. MT8888CSR1 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 -30 dBm MT8888CSR1 Applications • Credit card systems• Paging systems• Repeater systems/mobile radio• Interconnect dialers• Personal computers



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