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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Omschrijving Prijs 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-stocknr. 816-4698
Fabrikantnummer74HCT4514D,652
FabrikantNexperia
€ 1,359
Each (In a Pack of 10)
Aantal stuks
- - - - Surface Mount SOIC 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 5.5 V +125 °C - 4.5 V
RS-stocknr. 145-4239
FabrikantnummerMC74HC238ADR2G
FabrikantON Semiconductor
€ 0,083
Each (On a Reel of 2500)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +125 °C - 2 V
RS-stocknr. 662-7077
FabrikantnummerCD74HC238M96
€ 0,289
Each (In a Pack of 10)
Aantal stuks
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V +125 °C - 2 V
RS-stocknr. 671-1490
Fabrikantnummer74AC138SC
FabrikantON Semiconductor
€ 0,498
Each (In a Pack of 5)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +85 °C - 2 V
RS-stocknr. 178-9159
FabrikantnummerCD74HC139M96
€ 0,548
Each (In a Tube of 40)
Aantal stuks
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V +125 °C - 2 V
RS-stocknr. 166-2401
Fabrikantnummer74ACT138SCX
FabrikantON Semiconductor
€ 0,192
Each (On a Reel of 2500)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V +85 °C - 4.5 V
RS-stocknr. 145-6103
FabrikantnummerSN7445N
€ 2,14
Each (In a Tube of 25)
Aantal stuks
- - - - 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-stocknr. 759-9336
FabrikantnummerFSAL200MTCX
FabrikantON Semiconductor
€ 0,97
Each (In a Pack of 5)
Aantal stuks
- - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 5.5 V +85 °C - 3 V
RS-stocknr. 483-6392
Fabrikantnummer74HC137D,652
FabrikantNexperia
€ 0,455
Each (In a Pack of 10)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V +125 °C - 2 V
RS-stocknr. 171-3447
Fabrikantnummer74VHC139FT
FabrikantToshiba
€ 0,06
Each (In a Pack of 50)
Aantal stuks
- - - - Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V +125 °C AEC-Q100 2 V
RS-stocknr. 145-0014
FabrikantnummerSN74LS156N
€ 0,634
Each (In a Tube of 25)
Aantal stuks
- - - - 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-stocknr. 146-0367
Fabrikantnummer74HC138PW,112
FabrikantNexperia
€ 0,315
Each (In a Tube of 96)
Aantal stuks
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 6 V +125 °C - 2 V
RS-stocknr. 184-4278
FabrikantnummerMC74HC238ADG
FabrikantON Semiconductor
€ 0,07
Each (In a Tube of 48)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm - - 6 V +125 °C AEC-Q100 2 V
RS-stocknr. 483-6421
Fabrikantnummer74HC154D,652
FabrikantNexperia
€ 0,646
Each (In a Pack of 5)
Aantal stuks
- - - - Surface Mount SOIC 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 6 V +125 °C - 2 V
RS-stocknr. 145-0073
FabrikantnummerSN74ALS138AN
€ 0,69
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V +70 °C - 4.5 V
RS-stocknr. 709-2655
FabrikantnummerSN74LS155AN
€ 1,25
Each (In a Pack of 5)
Aantal stuks
- - - - 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-stocknr. 169-5679
FabrikantnummerSN74HCT139DR
€ 0,141
Each (On a Reel of 2500)
Aantal stuks
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.5 V +85 °C - 4.5 V
RS-stocknr. 166-1644
FabrikantnummerFSAL200QSCX
FabrikantON Semiconductor
€ 0,469
Each (On a Reel of 2500)
Aantal stuks
- - - - Surface Mount QSOP 16 5 x 3.9 x 1.357mm 1.357mm 5mm 5.5 V +85 °C - 3 V
RS-stocknr. 806-2163
FabrikantnummerMC74AC138DG
FabrikantON Semiconductor
€ 0,362
Each (In a Pack of 25)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +85 °C - 2 V
RS-stocknr. 671-1548
Fabrikantnummer74ACT139SCX
FabrikantON Semiconductor
€ 0,425
Each (In a Pack of 20)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V +85 °C - 4.5 V
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