Encoder & Decoder ICs

Encoders are logic semiconductor ICs (integrated circuits) that have been designed to encode and decode digital binary codes for inputs whilst decoders 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 dialling.

How do Encoders and Decoders work?

An encoder IC is manufactured to encode digital data from one format type or code to another that can accept multiple inputs and generate multi-bit output. Their primary functions are speed, security, standardisation by shrinking the size.

Decoder ICs increase connectivity in electronics to allow better control of applications. Home units like security alarm systems, electronic gates and garage doors, access control systems and everyday appliances make use of DTMF functionalities.

Types of Encoders and Decoders?

Encoder ICs are available with different encoding types such as Key and priority.

A DTMF (Dual Tone Multi-Frequency) decoder IC is a device that receives 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 dialling.

The most common types of DTMF Decoder ICs include 2-tone, 5-tone, multi-tone and burst-tone versions. Multi-tone decoders receive and translate multiple tones from the source whilst Burst-tone versions decode clashing frequencies into binary signals.

As well as being offered with variations of logic families, the number of pins on the IC and different mount types.

Applications of encoders and decoders

Encoders and decoders have an array of application use such as;

  • Smoke and fire alarm system
  • Home security systems
  • Identity tokens
  • Mobile phones and landlines

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Description Price Operating Frequency Fabrication Technology Typical Supply Current Minimum CMRR Mounting Type Package Type Pin Count Dimensions Maximum Operating Supply Voltage Maximum Operating Temperature Number of Elements per Chip Number of Input Enables per Element Logic Function Polarity
RS Stock No. 100-0709
Mfr. Part No.LM567CN/NOPB
kr 29,619
Each (In a Tube of 40)
Units
0.5MHz Bipolar - - Through Hole MDIP 8 9.27 x 6.35 x 3.3mm 9 V +70 °C - - - -
RS Stock No. 460-819
Mfr. Part No.LM567CN/NOPB
kr 34,572
Each (In a Pack of 5)
Units
0.5MHz Bipolar 12mA - Through Hole MDIP 8 9.27 x 6.35 x 3.3mm 9 V +70 °C - - - -
RS Stock No. 443-047
Mfr. Part No.SN74HC139N
kr 8,04
Each
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +85 °C - - - -
RS Stock No. 144-9900
Mfr. Part No.SN74HC139N
kr 7,601
Each (In a Tube of 25)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +85 °C - - - -
RS Stock No. 200-5288
Mfr. Part No.AS5045-ASST
Brandams OSRAM
kr 178,99
Each
Units
- - - - - SSOP 16 - - - - - - -
RS Stock No. 178-4134
Mfr. Part No.HCS301-I/SN
BrandMicrochip
kr 16,50
Each (In a Tube of 100)
Units
- - - - Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 13 V +85 °C - - - -
RS Stock No. 121-9249
Mfr. Part No.SN74LS247N
kr 20,708
Each (In a Tube of 25)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 5.25 V +70 °C - - - -
RS Stock No. 443-031
Mfr. Part No.SN74HC138N
kr 8,59
Each
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +85 °C - - - -
RS Stock No. 171-3382
Mfr. Part No.74HC138D
BrandToshiba
kr 1,281
Each (On a Reel of 2500)
Units
- - - - Surface Mount SOIC 16 10.2 x 3.9 x 1.38mm 6 V +125 °C - - - -
RS Stock No. 162-7469
Mfr. Part No.SN74LVC1G19DCKR
kr 1,241
Each (On a Reel of 3000)
Units
- - - - Surface Mount SC-70 6 2 x 1.25 x 0.9mm 5.5 V +85 °C - - - -
RS Stock No. 170-5417
Mfr. Part No.74LV4051PW,118
BrandNexperia
kr 4,501
Each (In a Pack of 10)
Units
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 6 V +125 °C - - - -
RS Stock No. 171-3318
Mfr. Part No.74VHC138FT
BrandToshiba
kr 1,193
Each (On a Reel of 2500)
Units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 1mm 5.5 V +125 °C - - - -
RS Stock No. 163-0573
Mfr. Part No.MC74AC138DG
Brandonsemi
kr 5,563
Each (In a Tube of 48)
Units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +85 °C - - - -
RS Stock No. 806-1416
Mfr. Part No.MC74HC139ADG
Brandonsemi
kr 6,126
Each (In a Pack of 48)
Units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C - - - -
RS Stock No. 307-575
Mfr. Part No.SN74LS42N
kr 44,46
Each
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 5.25 V +70 °C - - - -
RS Stock No. 759-9336
Mfr. Part No.FSAL200MTCX
Brandonsemi
kr 15,738
Each (In a Pack of 5)
Units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5.5 V +85 °C - - - -
RS Stock No. 145-6103
Mfr. Part No.SN7445N
kr 35,45
Each (In a Tube of 25)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 5.25 V +70 °C - - - -
RS Stock No. 709-2034
Mfr. Part No.CD74HC238E
kr 7,436
Each (In a Pack of 10)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +125 °C - - - -
RS Stock No. 662-7070
Mfr. Part No.CD74HC238PWR
kr 7,558
Each (In a Pack of 10)
Units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 6 V +125 °C - - - -
RS Stock No. 885-0705
Mfr. Part No.HT12D-20SOP
BrandHoltek
kr 9,844
Each (In a Tube of 38)
Units
- - - - Surface Mount SOP 20 12.8 x 7.5 x 2.35mm 12 V +75 °C - - - -