Decoders & Demultiplexers

The difference between decoders and demultiplexers is that demultiplexers select an output line. A decoder takes in inputs and uses those inputs to determine which of the 2N outputs lines is high.

Decoder:
digital circuit that converts an input binary code into a single numeric output
binary code input
only one output activated at a time
A decoder has:
N inputs
2N outputs
A decoder selects one of 2N outputs by decoding the binary value on the N inputs. The decoder generates all of the minterms of the N input variables. Exactly one output will be active for each combination of the inputs.
Demultiplexer (demux):
receives the output signals from the multiplexer and the receiver end it converts them back to the original form

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Description Price Logic Family Logic Function Demultiplexing Capability Number of Elements per Chip Number of Input Enables per Element Output Type Polarity Mounting Type Package Type Pin Count Dimensions Height Length Maximum Operating Supply Voltage
RS Stock No. 885-0702
Mfr. Part No.HT12D-18DIP
BrandHoltek
SGD1.294
Each (In a Tube of 25)
units
HT12 Decoder 1-of-8 1 8 CMOS - Through Hole PDIP 18 23.37 x 7.11 x 4.95mm 4.95mm 23.37mm 12 V
RS Stock No. 443-047
Mfr. Part No.SN74HC139N
SGD0.59
Each
units
HC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 144-9900
Mfr. Part No.SN74HC139N
SGD0.436
Each (In a Tube of 25)
units
HC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 121-9249
Mfr. Part No.SN74LS247NE4
SGD1.364
Each (In a Tube of 25)
units
LS Decoder, Driver - 1 - Open Collector Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 709-2160
Mfr. Part No.SN74LS247NE4
SGD2.218
Each (In a Pack of 5)
units
LS Decoder, Driver - 1 - Open Collector Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 368-6039
Mfr. Part No.SN74LS138N
SGD1.201
Each (In a Tube of 25)
units
LS Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 144-9897
Mfr. Part No.SN74LS139AN
SGD0.553
Each (In a Tube of 25)
units
LS Decoder, Demultiplexer 1-of-4 2 1 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 880-5282
Mfr. Part No.HCF4051YM013TR
SGD0.488
Each (In a Pack of 50)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 165-5506
Mfr. Part No.HCF4051YM013TR
SGD0.215
Each (On a Reel of 2500)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 145-6686
Mfr. Part No.SN74F138D
SGD0.369
Each (In a Tube of 40)
units
F Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.5 V
RS Stock No. 436-7537
Mfr. Part No.74HC237D,652
BrandNexperia
SGD0.414
Each (In a Tube of 50)
units
HC Decoder, Demultiplexer 1-of-8 1 1 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V
RS Stock No. 162-4150
Mfr. Part No.CD74HCT138E
SGD0.578
Each (In a Tube of 25)
units
HCT Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V
RS Stock No. 806-1413
Mfr. Part No.MC74HC138ADR2G
SGD0.224
Each (On a Tape of 50)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 3 State Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 170-3561
Mfr. Part No.MC74HC138ADR2G
SGD0.171
Each (On a Reel of 2500)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 3 State Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 122-0107
Mfr. Part No.MC74HC138ADG
SGD0.14
Each (In a Tube of 48)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 689-8709
Mfr. Part No.MC74HC138ADG
SGD0.462
Each (In a Pack of 5)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 144-9997
Mfr. Part No.CD74HC238EE4
SGD0.30
Each (In a Tube of 25)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 527-823
Mfr. Part No.CD74HC238M
SGD0.609
Each (In a Tube of 40)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 709-2034
Mfr. Part No.CD74HC238EE4
SGD0.849
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 662-7077
Mfr. Part No.CD74HC238M96
SGD0.32
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
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