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. 781-2762
Mfr. Part No.74HC138PW,112
BrandNexperia
HK$1.894
Each (In a Pack of 48)
units
74HC Decoder, Demultiplexer 3-of-8 1 3 - Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 6 V
RS Stock No. 145-0668
Mfr. Part No.SN74LS42N
HK$16.60
Each (In a Tube of 25)
units
LS Decoder, Demultiplexer 1-of-10 1 - - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 662-7673
Mfr. Part No.SN74AHC138PWR
HK$2.50
Each (In a Pack of 10)
units
AHC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 5.5 V
RS Stock No. 806-1075
Mfr. Part No.NC7SZ18P6X
HK$3.33
Each (In a Pack of 25)
units
TinyLogic UHS Demultiplexer 1-of-2 2 1 3 State Non-Inverting Surface Mount SC-70 6 2 x 1.25 x 1mm 1mm 2mm 5.5 V
RS Stock No. 663-2410
Mfr. Part No.SN74LS145D
HK$10.404
Each (In a Pack of 5)
units
LS Decoder, Driver 1-of-10 1 - Open Collector Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 145-7572
Mfr. Part No.SN74LVC1G18DBVR
HK$0.83
Each (On a Reel of 3000)
units
LVC Demultiplexer 1-of-2 1 1 3 State Non-Inverting Surface Mount SOT-23 6 2.9 x 1.6 x 1.15mm 1.15mm 2.9mm 5.5 V
RS Stock No. 170-8065
Mfr. Part No.HEF4051BT,652
BrandNexperia
HK$3.028
Each (In a Tube of 50)
units
HEF Demultiplexer, Multiplexer 1-of-8 1 3 Single Ended Non-Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 15 V
RS Stock No. 601-4083
Mfr. Part No.TC4511BF(F)
BrandToshiba
HK$17.748
Each (In a Pack of 5)
units
4000 Decoder, Driver - 1 1 - Non-Inverting Surface Mount SOP 16 10.3 x 5.3 x 1.5mm 1.5mm 10.3mm 18 V
RS Stock No. 162-7411
Mfr. Part No.SN74LS155AN
HK$8.133
Each (In a Tube of 25)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 Push-Pull Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 526-921
Mfr. Part No.SN74HC139D
HK$3.055
Each (In a Tube of 40)
units
HC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 162-7045
Mfr. Part No.SN74AHC138PWR
HK$0.884
Each (On a Reel of 2000)
units
AHC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 5.5 V
RS Stock No. 663-0509
Mfr. Part No.CD74HCT154M
HK$7.96
Each (In a Pack of 5)
units
HCT Decoder, Demultiplexer 1-of-16 1 2 - Inverting Surface Mount SOIC 24 15.4 x 7.52 x 2.35mm 2.35mm 15.4mm 5.5 V
RS Stock No. 633-969
Mfr. Part No.CD74HCT42E
HK$10.27
Each
units
HCT Decoder, Demultiplexer 1-of-10 1 - - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V
RS Stock No. 809-6194
Mfr. Part No.CD4028BPW
HK$3.791
Each (In a Pack of 15)
units
4000 Decoder 4-of-10 1 4 CMOS Non-Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 18 V
RS Stock No. 922-2912
Mfr. Part No.CD74HC4514M
HK$23.886
Each (In a Tube of 25)
units
HC Decoder, Demultiplexer 1-of-16 1 1 - Non-Inverting Surface Mount SOIC 24 15.4 x 7.52 x 2.35mm 2.35mm 15.4mm 6 V
RS Stock No. 145-6405
Mfr. Part No.SN74LS156D
HK$7.12
Each (In a Tube of 40)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 Open Collector Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 483-6487
Mfr. Part No.74HC238D,652
BrandNexperia
HK$4.14
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
RS Stock No. 809-6116
Mfr. Part No.74AC11138PW
HK$24.863
Each (In a Pack of 3)
units
AC Decoder, Demultiplexer 3-of-8 1 3 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 5.5 V
RS Stock No. 145-4506
Mfr. Part No.MM74HC138M
HK$4.58
Each (In a Tube of 48)
units
HC 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. 145-2971
Mfr. Part No.MC74ACT138DG
HK$3.59
Each (In a Tube of 48)
units
74ACT Decoder, Demultiplexer 1-of-8 1 3 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V
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