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 alarm systems, electronic gates and garage doors, intercom 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, and burst-tone versions decode clashing frequencies into binary signals 


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Beskrivning Pris Operating Frequency Fabrication Technology Typical Supply Current Minimum CMRR Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Supply Voltage Maximum Operating Temperature Automotive Standard Minimum Operating Supply Voltage
RS-artikelnummer 885-0702
Tillv. art.nrHT12D-18DIP
VarumärkeHoltek
5,612 kr
Each (In a Tube of 25)
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- - - - Through Hole PDIP 18 23.37 x 7.11 x 4.95mm 4.95mm 23.37mm 12 V +75 °C - 2.4 V
RS-artikelnummer 885-0768
Tillv. art.nrHT9170D-18SOP
VarumärkeHoltek
12,095 kr
Each (In a Tube of 42)
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3.57 → 3.58MHz CMOS - 60dB Surface Mount SOP 18 11.76 x 7.62 x 2.34mm - - 5.5 V +75 °C - 2.5 V
RS-artikelnummer 145-0014
Tillv. art.nrSN74LS156N
VarumärkeTexas Instruments
6,411 kr
Each (In a Tube of 25)
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- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V +70 °C - 4.75 V
RS-artikelnummer 102-5740
Tillv. art.nrLM567CM/NOPB
VarumärkeTexas Instruments
18,591 kr
Each (In a Tube of 95)
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0.5MHz Bipolar - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm - - 9 V +70 °C - 4.75 V
RS-artikelnummer 436-7537
Tillv. art.nr74HC237D,652
VarumärkeNexperia
4,244 kr
Each (In a Tube of 50)
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- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V +125 °C - 2 V
RS-artikelnummer 536-0953
Tillv. art.nrLM567CM/NOPB
VarumärkeTexas Instruments
19,677 kr
Each (In a Pack of 10)
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0.5MHz Bipolar 12mA - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm - - 9 V +70 °C - 4.75 V
RS-artikelnummer 709-2472
Tillv. art.nrSN74LS156N
VarumärkeTexas Instruments
7,692 kr
Each (In a Pack of 5)
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- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V +70 °C - 4.75 V
RS-artikelnummer 145-6405
Tillv. art.nrSN74LS156D
VarumärkeTexas Instruments
3,253 kr
Each (In a Tube of 40)
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- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V +70 °C - 4.75 V
RS-artikelnummer 152-5529
Tillv. art.nr74HC4852D,118
VarumärkeNexperia
2,292 kr
Each (In a Pack of 10)
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- - - - Surface Mount SO 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +125 °C - 2 V
RS-artikelnummer 806-3309
Tillv. art.nrMC14543BDR2G
VarumärkeON Semiconductor
2,912 kr
Each (In a Pack of 25)
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- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V +125 °C - -0.5 V
RS-artikelnummer 122-2833
Tillv. art.nr74HC138S16-13
VarumärkeDiodesZetex
1,147 kr
Each (On a Reel of 2500)
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- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +125 °C - 2 V
RS-artikelnummer 802-1358
Tillv. art.nr74VHC138M
VarumärkeON Semiconductor
4,412 kr
Each (In a Tube of 48)
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- - - - Surface Mount SOIC 16 10 x 3.988 x 1.499mm 1.499mm 10mm 5.5 V +85 °C - 2 V
RS-artikelnummer 178-9169
Tillv. art.nrSN74ALS139DR
VarumärkeTexas Instruments
9,678 kr
Each (In a Tube of 40)
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- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.5 V +70 °C - 4.5 V
RS-artikelnummer 809-6194
Tillv. art.nrCD4028BPW
VarumärkeTexas Instruments
1,335 kr
Each (In a Pack of 15)
Enheter
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 18 V +125 °C - 3 V
RS-artikelnummer 145-4187
Tillv. art.nrNL7SZ19DFT2G
VarumärkeON Semiconductor
0,522 kr
Each (On a Reel of 3000)
Enheter
- - - - Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 5.5 V +85 °C - 1.65 V
RS-artikelnummer 671-1548
Tillv. art.nr74ACT139SCX
VarumärkeON Semiconductor
4,488 kr
Each (In a Pack of 20)
Enheter
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V +85 °C - 4.5 V
RS-artikelnummer 145-5318
Tillv. art.nr74LCX138MTC
VarumärkeON Semiconductor
1,128 kr
Each (In a Tube of 94)
Enheter
- - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 3.6 V +85 °C - 2 V
RS-artikelnummer 663-1259
Tillv. art.nrSN74AHCT138PW
VarumärkeTexas Instruments
3,971 kr
Each (In a Pack of 10)
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- - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 5.5 V +85 °C - 4.5 V
RS-artikelnummer 806-1416
Tillv. art.nrMC74HC139ADG
VarumärkeON Semiconductor
2,675 kr
Each (In a Pack of 48)
Enheter
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +125 °C - 2 V
RS-artikelnummer 145-0668
Tillv. art.nrSN74LS42N
VarumärkeTexas Instruments
16,288 kr
Each (In a Tube of 25)
Enheter
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V +70 °C - 4.75 V
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