MT8870 IC – DTMF Decoder IC
The MT8870 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.
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Description
The MT8870 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.
Features:-
? Complete DTMF Receiver
? Low power consumption
? Internal gain setting amplifier
? Adjustable guard time
? Central office quality
? Power-down mode
? Inhibit mode
? Backward compatible with MT8870C/MT8870C-1
Specification:-
| Symbol | Parameter | Min | Max | Units |
| VDD | DC Power Supply Voltage | 7 | 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 | 500 | m W |
Related Document:- MT8870 IC Data Sheet
Additional information
Operating voltage | 2.5 3.0V |
Pixel Resolution | 0.3MP |
Photosensitive array | 640 x 480 |
Optical Size | 1.6 inch |
Angel of view | 67 degrees |
Maximum Frame Rate | 30fps VGA |
Sensitivity | 1.3V/(Lux-sec) |
Dormancy | Less than 20A |
Power consumption | 60mW/15fpsVGA YUV |
Temperature operation Range | -30 C ~ 70 C |
Pixel area | 3.6 x 3.6 m |
Signal to noise ratio (SNR) | 46 dB |
Dynamic range | 52 dB |


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