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. 308-253
Mfr. Part No.SN74LS139AN
HK$7.41
Each
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. 162-7426
Mfr. Part No.SN74LV138APWR
HK$0.964
Each (On a Reel of 2000)
units
LV 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. 885-0702
Mfr. Part No.HT12D-18DIP
BrandHoltek
HK$5.931
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. 170-8040
Mfr. Part No.74HC154D,653
BrandNexperia
HK$2.637
Each (On a Reel of 1000)
units
74HC Decoder, Demultiplexer 4-of-16 1 2 Single Ended Inverting Surface Mount SO 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 6 V
RS Stock No. 162-6504
Mfr. Part No.CD4511BPW
HK$3.729
Each (In a Tube of 90)
units
4000 Decoder 4-of-7 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. 540-7759
Mfr. Part No.TC74HC138AF(F)
BrandToshiba
HK$2.574
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOP 16 10.3 x 5.3 x 1.5mm 1.5mm 10.3mm 6 V
RS Stock No. 709-2034
Mfr. Part No.CD74HC238E
HK$4.931
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. 436-7537
Mfr. Part No.74HC237D,652
BrandNexperia
HK$4.357
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. 307-575
Mfr. Part No.SN74LS42N
HK$19.60
Each
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. 121-8345
Mfr. Part No.SN74LS138D
HK$6.48
Each (In a Tube of 40)
units
LS Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 802-1733
Mfr. Part No.NL7SZ19DFT2G
HK$2.616
Each (On a Tape of 50)
units
LCX Decoder, Demultiplexer 1-of-2 1 1 CMOS - Surface Mount SC-70 6 2.2 x 1.35 x 1mm 1mm 2.2mm 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. 806-3737
Mfr. Part No.MC74LCX138DR2G
HK$3.37
Each (On a Tape of 25)
units
LCX Decoder, Demultiplexer 3-of-8 1 3 Single Ended Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 3.6 V
RS Stock No. 162-6133
Mfr. Part No.CD74HC237E
HK$3.531
Each (In a Tube of 25)
units
74HC Decoder, Demultiplexer 1-of-8 1 1 - Inverting Through Hole PDIP 16 19.69 x 6.6 x 4.57mm 4.57mm 19.69mm 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
RS Stock No. 806-2163
Mfr. Part No.MC74AC138DG
HK$2.502
Each (In a Pack of 25)
units
74AC 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. 145-0014
Mfr. Part No.SN74LS156N
HK$5.342
Each (In a Tube of 25)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 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. 170-5357
Mfr. Part No.74HC4851PW,118
BrandNexperia
HK$5.057
Each (In a Pack of 25)
units
74HC Demultiplexer, Multiplexer 1-of-8 1 3 Single Ended Non-Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 6 V
RS Stock No. 146-0417
Mfr. Part No.74HCT154PW,112
BrandNexperia
HK$6.34
Each (In a Tube of 63)
units
74HCT Decoder, Demultiplexer 1-of-16 1 4 CMOS Inverting Surface Mount TSSOP 24 7.9 x 4.5 x 0.95mm 0.95mm 7.9mm 5.5 V
RS Stock No. 162-7469
Mfr. Part No.SN74LVC1G19DCKR
HK$0.83
Each (On a Reel of 3000)
units
LVC Decoder, Demultiplexer 1-of-2 1 1 - Non-Inverting Surface Mount SC-70 6 2 x 1.25 x 0.9mm 0.9mm 2mm 5.5 V
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