The MT8888 is a monolithic DTMF transceiver with call progress filter. It is fabricated in Mitel’s ISO2- CMOS technology, which provides low power dissipation and high reliability. The DTMF receiver is based upon the industry standard MT8870 monolithic DTMF receiver; 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. A standard microprocessor bus is provided and is directly compatible with 6800 series microprocessors. 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 Specifications:- Symbol Parameter Min Max Units VDD DC Power Supply Voltage 6 V VI Voltage on any pin VSS-0.3 VDD 0.3 V II Current at any pin (other than supply) 10 m A TSTG Storage temperature -65 150 °C PD Package power dissipation 1000 m W Package Includes:- • 1 x MT8888 Integrated DTMF Transceiver IC
