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Products Detail

Category : Interface Board
Sub Category : DTMF Decoder
Unit Price :
200 -00/-
Model : Int00058
Bulk Price :
Quantity Price Discount
6 - 10 196 /- each 2% Off
11 - 100 190 /- each 5% Off
101 - 500 180 /- each 10% Off
500+ 160 /- each 20% Off
Product Type : GL™ Product
Availability :
Warranty : No Warranty
Minimum Order : 1
Downloads Image Size
Data sheet 492.99 KB
Product Details
  Decodes DTMF audio signal to 4 bit binary TTL level output with LED indication. Suitable for use with microcontroller applications. Connect regulated +5V DC supply for operation of board. Outputs Q1-4 and VT are active high output at 5V level. If any LED is on means that output is at high level. VT LED blinks once a new DTMF tone is received. The binary data appears at Q1 to Q4. Details of this output are on next page. Input signal can be from an audio source like microphone amplifier, FM radio receiver, and wired phone line. Please note when connecting land line phone signal, do not connect ground wire of board to phone line directly. Use a 100nF capacitor in series to phone line wires at ground.

Decodes DTMF as 4 bit binary
TTL level output for direct connection to microcontrollers
Low power 5V DC operation
LED indication of outputs
Simple to use
Based on excellent MT9170 IC

Circuitry to send tones is easier to build with modern ICs and much easier to control with computers or other electronic equipment when compared to pulse dialling systems. This means tone dialling is more compatible with modern systems and automatic unattended operations.
• Efficiency





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