DTMF Decoders

DTMF (Dual Tone Multi-Frequency) decoders are devices that receive data transmissions in amateur radio frequency bands. They constantly monitor incoming signals for valid DTMF digits. These electronic circuits decode DTMF dial tones from telephone lines into touch-tone phones via a process known as tone dialing.

The basic DTMF decoder identifies tones from a normal touch-tone phone. It then activates an LED to provide a 4-bit binary signal as an output code.
DTMF decoders are tolerant of level variations, but function optimally at a 0dB range.

What are DTMF decoders used for?
DTMF decoders increase connectivity in electronics to allow better control of applications. Home applications like security alarm systems , electronic gates and garage doors, access control systems and everyday appliances make use of DTMF functionalities.
Public switched telephone networks (PSTN) and voice response systems are other examples where DTMF application is necessary.

Types of DTMF decoders
The most common types of DTMF Decoders include 2-tone, 5-tone, multi-tone and burst-tone versions.
  • Multi-tone decoders receive and translate multiple tones from the source
  • Burst-tone versions decode clashing frequencies into binary signals.
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Išsami informacija Markė Stock Operating Frequency Fabrication Technology Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Supply Voltage Maximum Operating Temperature Width Minimum Operating Temperature Minimum Operating Supply Voltage
New Japan Radio NJM567M, DTMF Decoder, 8-Pin DMP
  • € 1,10
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Tikrinti sandėlio būklę - - Surface Mount Please note that the Stock level on this page is periodically updated during the day.

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Texas Instruments LM567CM/NOPB, DTMF Decoder, 0.5MHz, 4.75 → 9 V, 8-Pin SOIC
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New Japan Radio NJM2211D, DTMF Decoder, 14-Pin PDIP
  • € 1,65
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Texas Instruments LM567CN/NOPB, DTMF Decoder, 0.5MHz, 4.75 → 9 V, 8-Pin MDIP
  • € 2,05
  • Each (In a Tube of 40)
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Texas Instruments Please note that the Stock level on this page is periodically updated during the day.

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Bipolar Please note that the Stock level on this page is periodically updated during the day.

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Through Hole Please note that the Stock level on this page is periodically updated during the day.

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