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. 144-9900
FabrikantnummerSN74HC139N
€ 0,354
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V +85 °C - 2 V
RS-stocknr. 443-047
FabrikantnummerSN74HC139N
€ 0,48
Each
Aantal stuks
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V +85 °C - 2 V
RS-stocknr. 355-9460
FabrikantnummerHEF4543BT,652
FabrikantNexperia
€ 0,14
Each
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 15 V +85 °C - 3 V
RS-stocknr. 178-6970
FabrikantnummerHEF4543BT,652
FabrikantNexperia
€ 0,118
Each (In a Tube of 50)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 15 V +85 °C - 3 V
RS-stocknr. 526-921
FabrikantnummerSN74HC139D
€ 0,334
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 +85 °C - 2 V
RS-stocknr. 662-8102
FabrikantnummerSN74HC139DR
€ 0,084
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 +85 °C - 2 V
RS-stocknr. 885-0702
FabrikantnummerHT12D-18DIP
FabrikantHoltek
€ 0,588
Each (In a Tube of 25)
Aantal stuks
- - - - Through Hole PDIP 18 23.37 x 7.11 x 4.95mm 4.95mm 23.37mm 12 V +75 °C - 2.4 V
RS-stocknr. 865-1586
Fabrikantnummer74HCT139D,652
FabrikantNexperia
€ 0,309
Each (In a Tube of 50)
Aantal stuks
- - - - Surface Mount SOIC 16 6.4 x 5.4 x 1.8mm 1.8mm 6.4mm 5.5 V +125 °C - 4.5 V
RS-stocknr. 527-158
FabrikantnummerSN74HC138D
€ 0,321
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 +85 °C - 2 V
RS-stocknr. 536-0953
FabrikantnummerLM567CM/NOPB
€ 1,619
Each (In a Pack of 10)
Aantal stuks
0.5MHz Bipolar 12mA - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 9 V +70 °C - 4.75 V
RS-stocknr. 100-0709
FabrikantnummerLM567CN/NOPB
€ 1,63
Each (In a Tube of 40)
Aantal stuks
0.5MHz Bipolar - - Through Hole MDIP 8 9.27 x 6.35 x 3.3mm 3.3mm 9.27mm 9 V +70 °C - 4.75 V
RS-stocknr. 483-6487
Fabrikantnummer74HC238D,652
FabrikantNexperia
€ 0,349
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. 102-5740
FabrikantnummerLM567CM/NOPB
€ 1,62
Each (In a Tube of 95)
Aantal stuks
0.5MHz Bipolar - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 1.45mm 4.9mm 9 V +70 °C - 4.75 V
RS-stocknr. 170-8004
Fabrikantnummer74HC238D,653
FabrikantNexperia
€ 0,154
Each (On a Reel of 2500)
Aantal stuks
- - - - Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V +125 °C - 2 V
RS-stocknr. 806-1416
FabrikantnummerMC74HC139ADG
FabrikantON Semiconductor
€ 0,264
Each (In a Pack of 48)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V +125 °C - 2 V
RS-stocknr. 103-5683
Fabrikantnummer74HC238D,652
FabrikantNexperia
€ 0,349
Each (In a Tube of 50)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V +125 °C - 2 V
RS-stocknr. 460-819
FabrikantnummerLM567CN/NOPB
€ 1,914
Each (In a Pack of 5)
Aantal stuks
0.5MHz Bipolar 12mA - Through Hole MDIP 8 9.27 x 6.35 x 3.3mm 3.3mm 9.27mm 9 V +70 °C - 4.75 V
RS-stocknr. 885-0705
FabrikantnummerHT12D-20SOP
FabrikantHoltek
€ 0,544
Each (In a Tube of 38)
Aantal stuks
- - - - Surface Mount SOP 20 12.8 x 7.5 x 2.35mm 2.35mm 12.8mm 12 V +75 °C - 2.4 V
RS-stocknr. 781-2831
Fabrikantnummer74HC4514D,652
FabrikantNexperia
€ 0,969
Each (In a Pack of 10)
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. 518-9530A
FabrikantnummerMC14543BDG
FabrikantON Semiconductor
€ 0,311
Each (In a Pack of 48)
Aantal stuks
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V +125 °C - 3 V
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