MT8816
The Mitel MT8816 is built with MITEL's ISO-CMOS technology, which provides low power dissipation and great reliability. The device has an 8 ? 16 array of cross point switches, as well as a 7 to 128 line decoder and latch circuits. By selecting the relevant seven address bits, any of the 128 switches can be addressed. By adding a rational one or zero to the DATA input, the chosen switch can be turned on or off. VSS is the digital inputs' ground reference. The analogue signal has a range of VDD to VEE. Chip Select (CS) enables the cross point array to be cascaded for matrix enlargement.
MT8870
The MT8870D/MT8870D-1 is a comprehensive DTMF receiver that incorporates both the band split filter and the digital decoder features. For high and low group filters, switched capacitor techniques are used; for decoding, digital counting techniques are used to identify and decode all 16 DTMF tone-pairs into a 4-bit code. The on-chip supply of a differential input amplifier, clock oscillator, and latched three-state bus interface reduces the number of external components.
MT8870 DTMF RECEIVER
The MT8870D/MT8870D-1 is a complete DTMF receiver integrating both the band split filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone pairs into a 4-bit code. External component count is minimized by on chip provision of a differential input amplifier, clock oscillator and latched three-state bus interface.
MT8870 IC – DTMF Decoder IC
The MT8870 is a complete DTMF receiver integrating both the bandsplit filter and digital decoder functions. The filter section uses switched capacitor techniques for high and low group filters; the decoder uses digital counting techniques to detect and decode all 16 DTMF tone-pairs into a 4-bit code.
MT8880 IC – DTMF Encoder IC
The MT8880 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.
MT8888CS
The MT8888 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 MT8888C utilizes an Intel micro interface, which allows the device to be connected to a number of popular microcontrollers with minimal external logic.
