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
PHP32.427
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. 307-581
Mfr. Part No.SN74LS47N
PHP85.98
Each
units
LS Decoder, Driver - 1 0 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. 709-2034
Mfr. Part No.CD74HC238EE4
PHP22.03
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. 144-9997
Mfr. Part No.CD74HC238EE4
PHP11.654
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. 662-9698
Mfr. Part No.CD4511BEE4
PHP26.466
Each (In a Pack of 5)
units
4000 Decoder, Driver - 1 1 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 18 V
RS Stock No. 368-6039
Mfr. Part No.SN74LS138N
PHP30.466
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. 539-9383
Mfr. Part No.TC74HC42AP(F)
BrandToshiba
PHP34.89
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-10 1 0 - Inverting Through Hole PDIP 16 19.25 x 6.4 x 3.5mm 3.5mm 19.25mm 6 V
RS Stock No. 709-2160
Mfr. Part No.SN74LS247NE4
PHP81.134
Each (In a Pack of 5)
units
LS Decoder, Driver - 1 0 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. 885-0705
Mfr. Part No.HT12D-20SOP
BrandHoltek
PHP31.496
Each (In a Tube of 38)
units
HT12 Decoder 1-of-8 1 8 CMOS - Surface Mount SOP 20 12.8 x 7.5 x 2.35mm 2.35mm 12.8mm 12 V
RS Stock No. 663-0610
Mfr. Part No.CD74HCT4511E
PHP39.948
Each (In a Pack of 5)
units
HCT Decoder, Driver - 1 1 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V
RS Stock No. 122-2833
Mfr. Part No.74HC138S16-13
PHP4.959
Each (On a Reel of 2500)
units
HC Decoder, Demultiplexer 3-of-8 8 6 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 798-9023
Mfr. Part No.74HC138S16-13
PHP5.615
Each (In a Pack of 25)
units
HC Decoder, Demultiplexer 3-of-8 8 6 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 121-9249
Mfr. Part No.SN74LS247NE4
PHP58.685
Each (In a Tube of 25)
units
LS Decoder, Driver - 1 0 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. 527-823
Mfr. Part No.CD74HC238M
PHP18.899
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. 528-066
Mfr. Part No.SN74HCT138D
PHP9.26
Each (In a Tube of 40)
units
HCT 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. 170-8004
Mfr. Part No.74HC238D,653
BrandNexperia
PHP8.84
Each (On a Reel of 2500)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 Single Ended Non-Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V
RS Stock No. 178-5526
Mfr. Part No.CD74HC154M96
PHP31.426
Each (In a Tube of 25)
units
HC Decoder, Demultiplexer 1-of-16 1 2 - Inverting Surface Mount SOIC 24 15.4 x 7.52 x 2.35mm 2.35mm 15.4mm 6 V
RS Stock No. 103-5683
Mfr. Part No.74HC238D,652
BrandNexperia
PHP11.73
Each (In a Tube of 50)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V
RS Stock No. 662-8269
Mfr. Part No.SN74HCT138DR
PHP16.806
Each (In a Pack of 10)
units
HCT 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. 483-6487
Mfr. Part No.74HC238D,652
BrandNexperia
PHP14.041
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V
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