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
RS Stock No. 125-0046
Mfr. Part No.MC74VHC139DTR2G
HK$1.298
Each (On a Reel of 2500)
units
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 5.5 V +125 °C - 2 V -55 °C
RS Stock No. 739-5175
Mfr. Part No.NC7SZ19P6X
HK$3.592
Each (In a Pack of 5)
units
- - - - Surface Mount SC-70 6 2 x 1.25 x 1mm 5.5 V +85 °C - 1.65 V -40 °C
RS Stock No. 145-4239
Mfr. Part No.MC74HC238ADR2G
HK$1.003
Each (On a Reel of 2500)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C - 2 V -55 °C
RS Stock No. 761-4306
Mfr. Part No.74ACT138SCX
HK$4.388
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. 806-3298
Mfr. Part No.MC14532BDG
HK$6.321
Each (In a Pack of 20)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 18 V +125 °C - 3 V -55 °C
RS Stock No. 671-1740
Mfr. Part No.MM74HC138M
HK$5.932
Each (In a Pack of 5)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +85 °C - 2 V -40 °C
RS Stock No. 806-1508
Mfr. Part No.MC74HC238ADR2G
HK$2.441
Each (In a Pack of 50)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C - 2 V -55 °C
RS Stock No. 759-9336
Mfr. Part No.FSAL200MTCX
HK$12.044
Each (In a Pack of 5)
units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 5.5 V +85 °C - 3 V -40 °C
RS Stock No. 806-2163
Mfr. Part No.MC74AC138DG
HK$2.502
Each (In a Pack of 25)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +85 °C - 2 V -40 °C
RS Stock No. 122-0107
Mfr. Part No.MC74HC138ADG
HK$2.436
Each (In a Tube of 48)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C - 2 V -55 °C
RS Stock No. 806-1416
Mfr. Part No.MC74HC139ADG
HK$3.475
Each (In a Pack of 48)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C - 2 V -55 °C
RS Stock No. 166-2401
Mfr. Part No.74ACT138SCX
HK$2.05
Each (On a Reel of 2500)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 5.5 V +85 °C - 4.5 V -40 °C
RS Stock No. 166-1972
Mfr. Part No.74ACT139SCX
HK$2.348
Each (On a Reel of 2500)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 5.5 V +85 °C - 4.5 V -40 °C
RS Stock No. 166-1644
Mfr. Part No.FSAL200QSCX
HK$4.594
Each (On a Reel of 2500)
units
- - - - Surface Mount QSOP 16 5 x 3.9 x 1.357mm 5.5 V +85 °C - 3 V -40 °C
RS Stock No. 145-4496
Mfr. Part No.74ACT138SC
HK$5.324
Each (In a Tube of 48)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 5.5 V 85 °C - 4.5 V -40 °C
RS Stock No. 184-4278
Mfr. Part No.MC74HC238ADG
HK$3.57
Each (In a Tube of 48)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +125 °C AEC-Q100 2 V -55 °C
RS Stock No. 671-1490
Mfr. Part No.74AC138SC
HK$5.39
Each (In a Pack of 5)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +85 °C - 2 V -40 °C
RS Stock No. 806-2166
Mfr. Part No.MC74AC139DG
HK$3.646
Each (In a Pack of 25)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 6 V +85 °C - 2 V -40 °C
RS Stock No. 806-3157
Mfr. Part No.MC14028BDG
HK$3.533
Each (In a Pack of 25)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 18 V +125 °C - 3 V -55 °C
RS Stock No. 145-2978
Mfr. Part No.MC14532BDG
HK$6.873
Each (In a Tube of 48)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 18 V +125 °C - 3 V -55 °C