MT8870DS

Integrated DTMF Receiver
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Số lượng
Cái
Đơn giá(VND)
1
15,000

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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

Applications

• Receiver system for British Telecom (BT) or CEPT Spec (MT8870D-1)

• Paging systems

• Repeater systems/mobile radio

• Credit card systems

• Remote control

• Personal computers

• Telephone answering machine

Description

The MT8870D/MT8870D-1 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 tonepairs 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.

Ordering Information

MT8870DE/DE-1 18 Pin Plastic DIP

MT8870DS/DS-1 18 Pin SOIC

MT8870DN/DN-1 20 Pin SSOP

 

 



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