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. 145-7828
Mfr. Part No.74AC11138D
€1.978
Each (In a Tube of 40)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 5.5 V +85 °C - 3 V -40 °C -
RS Stock No. 885-0768
Mfr. Part No.HT9170D-18SOP
BrandHoltek
€1.167
Each (In a Tube of 42)
units
3.57 to 3.58MHz CMOS - 60dB Surface Mount SOP 18 11.76 x 7.62 x 2.34mm 5.5 V +75 °C - 2.5 V -20 °C -
RS Stock No. 152-3694
Mfr. Part No.74LVC1G19GW,125
BrandNexperia
€0.024
Each (In a Pack of 100)
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. 162-7427
Mfr. Part No.SN74LV139APWR
€0.09
Each (On a Reel of 2000)
units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 5.5 V +85 °C - 2 V -40 °C -
RS Stock No. 174-4145
Mfr. Part No.AEDR-8502-102
BrandBroadcom
€9.32
Each
units
- - - - Surface Mount SMD 8 3.95 x 3.4 x 0.95mm 5.5 V +85 °C - 4.5 V -20 °C -
RS Stock No. 305-406
Mfr. Part No.SN7447AN
€3.00
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. 759-9330
Mfr. Part No.FSAL200QSCX
€1.152
Each (In a Pack of 5)
units
- - - - Surface Mount QSOP 16 5 x 3.9 x 1.357mm 5.5 V +85 °C - 3 V -40 °C -
RS Stock No. 171-3382
Mfr. Part No.74HC138D
BrandToshiba
€0.094
Each (On a Reel of 2500)
units
- - - - Surface Mount SOIC 16 10.2 x 3.9 x 1.38mm 6 V +125 °C - 2 V -40 °C -
RS Stock No. 145-0512
Mfr. Part No.CD4028BPW
€0.131
Each (In a Tube of 90)
units
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 18 V +125 °C - 3 V -55 °C -
RS Stock No. 144-9997
Mfr. Part No.CD74HC238E
€0.479
Each (In a Tube of 25)
units
- - - - Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 6 V +125 °C - 2 V -55 °C -
RS Stock No. 833-709
Mfr. Part No.CD74HCT138M
€0.70
Each
units
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 5.5 V +125 °C - 4.5 V -55 °C -
RS Stock No. 170-8040
Mfr. Part No.74HC154D,653
BrandNexperia
€0.23
Each (On a Reel of 1000)
units
- - - - Surface Mount SO 24 15.6 x 7.6 x 2.45mm 6 V +125 °C - 2 V -40 °C -
RS Stock No. 798-8897
Mfr. Part No.74AHC138S16-13
€0.055
Each (In a Pack of 25)
units
- - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 5.5 V +125 °C - 2 V -40 °C -
RS Stock No. 923-2486
Mfr. Part No.SN74HC138N
€0.325
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. 178-9211
Mfr. Part No.SN74LS47D
€1.495
Each (In a Tube of 40)
units
- - - - Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 5.25 V +70 °C - 4.75 V 0 °C -
RS Stock No. 165-8697
Mfr. Part No.74HCT153PW,112
BrandNexperia
€0.104
Each (In a Bag of 2400)
units
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 5.5 V +125 °C - 4.5 V -40 °C -
RS Stock No. 816-8769
Mfr. Part No.74LVC1G157GW,125
BrandNexperia
€0.242
Each (In a Pack of 50)
units
- - - - Surface Mount SC-88 6 2.2 x 1.35 x 1mm 5.5 V +125 °C - 1.65 V -40 °C -
RS Stock No. 170-4896
Mfr. Part No.74HC4851PW,118
BrandNexperia
€0.132
Each (On a Reel of 2500)
units
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 6 V +125 °C - 2 V -40 °C -
RS Stock No. 170-4872
Mfr. Part No.74HC238PW,118
BrandNexperia
€0.161
Each (On a Reel of 2500)
units
- - - - Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 6 V +125 °C - 2 V -40 °C -
RS Stock No. 162-7426
Mfr. Part No.SN74LV138APWR
€0.106
Each (On a Reel of 2000)
units
- - - - Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 5.5 V +85 °C - 2 V -40 °C -