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 Automotive Standard Minimum Operating Supply Voltage Minimum Operating Temperature Number of Elements per Chip
RS Stock No. 100-0709
Mfr. Part No.LM567CN/NOPB
kr 18,892
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 - 4.75 V 0 °C -
RS Stock No. 460-819
Mfr. Part No.LM567CN/NOPB
kr 22,242
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 - 4.75 V 0 °C -
RS Stock No. 144-9900
Mfr. Part No.SN74HC139N
kr 3,931
Each (In a Tube of 25)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +85 °C - 2 V -40 °C -
RS Stock No. 663-0045
Mfr. Part No.CD74HC138M
kr 1,782
Each (In a Pack of 5)
Units
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 6 V +125 °C - 2 V -55 °C -
RS Stock No. 443-047
Mfr. Part No.SN74HC139N
kr 4,57
Each
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +85 °C - 2 V -40 °C -
RS Stock No. 170-5337
Mfr. Part No.HEF4051BT,653
BrandNexperia
kr 4,036
Each (In a Pack of 25)
Units
- - - - Surface Mount SO 16 10 x 4 x 1.45mm 15 V +125 °C - 3 V -40 °C -
RS Stock No. 355-9460
Mfr. Part No.HEF4543BT,652
BrandNexperia
kr 1,78
Each
Units
- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 15 V +85 °C - 3 V -40 °C -
RS Stock No. 662-9531
Mfr. Part No.CD40147BE
kr 1,804
Each (In a Pack of 5)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 18 V +125 °C - 3 V -55 °C -
RS Stock No. 121-9227
Mfr. Part No.CD74HC4511M
kr 7,545
Each (In a Tube of 40)
Units
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 6 V +125 °C - 2 V -55 °C -
RS Stock No. 308-253
Mfr. Part No.SN74LS139AN
kr 8,91
Each
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 5.25 V +70 °C - 4.75 V 0 °C -
RS Stock No. 865-1586
Mfr. Part No.74HCT139D,652
BrandNexperia
kr 3,731
Each (In a Tube of 50)
Units
- - - - Surface Mount SOIC 16 6.4 x 5.4 x 1.8mm 5.5 V +125 °C - 4.5 V -40 °C -
RS Stock No. 806-1413
Mfr. Part No.MC74HC138ADR2G
Brandonsemi
kr 3,481
Each (On a Tape of 50)
Units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C - 2 V -55 °C -
RS Stock No. 368-7329
Mfr. Part No.HEF4028BT,652
BrandNexperia
kr 4,309
Each (In a Tube of 50)
Units
- - - - Surface Mount SOIC 16 10 x 4 x 1.45mm 15 V +85 °C - 3 V -40 °C -
RS Stock No. 145-0465
Mfr. Part No.CD4028BE
kr 5,118
Each (In a Tube of 25)
Units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 18 V +125 °C - 3 V -55 °C -
RS Stock No. 662-7014
Mfr. Part No.CD74HC139M96
kr 1,705
Each (In a Pack of 10)
Units
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 6 V +125 °C - 2 V -55 °C -
RS Stock No. 171-3320
Mfr. Part No.74VHC139FT
BrandToshiba
kr 1,075
Each (On a Reel of 2500)
Units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 1mm 5.5 V +125 °C AEC-Q100 2 V -40 °C -
RS Stock No. 151-3384
Mfr. Part No.74LVC1G19GW,125
BrandNexperia
kr 0,666
Each (On a Reel of 3000)
Units
- - - - Surface Mount TSSOP 6 2.2 x 1.35 x 1mm 5.5 V +125 °C - 1.65 V -40 °C -
RS Stock No. 761-4306
Mfr. Part No.74ACT138SCX
Brandonsemi
kr 1,727
Each (On a Tape of 10)
Units
- - - - Surface Mount SOIC 16 10 x 6.198 x 1.499mm 5.5 V +85 °C - 4.5 V -40 °C -
RS Stock No. 861-0560
Mfr. Part No.HCS301-I/SN
BrandMicrochip
kr 13,546
Each (In a Pack of 5)
Units
- - - - Surface Mount SOIC 8 4.9 x 3.9 x 1.5mm 13 V +85 °C - 3.5 V -40 °C -
RS Stock No. 136-4884
Mfr. Part No.74HC138D,653
BrandNexperia
kr 2,012
Each (In a Pack of 100)
Units
- - - - Surface Mount SO 16 10 x 4 x 1.45mm 5.5 V +125 °C - 4.5 V -40 °C -