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. 178-9169
Mfr. Part No.SN74ALS139DR
HK$9.056
Each (In a Tube of 40)
units
ALS Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.5 V
RS Stock No. 880-5282
Mfr. Part No.HCF4051YM013TR
HK$2.607
Each (In a Pack of 50)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 662-7294
Mfr. Part No.CD74HCT238M96
HK$4.30
Each (In a Pack of 10)
units
HCT 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 5.5 V
RS Stock No. 663-2420
Mfr. Part No.SN74LS155AD
HK$10.566
Each (In a Pack of 5)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 Push-Pull Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 709-2034
Mfr. Part No.CD74HC238EE4
HK$3.577
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. 816-8775
Mfr. Part No.74LVC1G18GW,125
BrandNexperia
HK$0.587
Each (In a Pack of 75)
units
74LVC Demultiplexer 1-of-2 1 1 3 State Non-Inverting Surface Mount SC-88 6 2.2 x 1.35 x 1mm 1mm 2.2mm 5.5 V
RS Stock No. 806-1508
Mfr. Part No.MC74HC238ADR2G
HK$1.812
Each (In a Pack of 50)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 3 State Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 539-9513
Mfr. Part No.TC74HC138AP(F)
BrandToshiba
HK$4.61
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.25 x 6.4 x 3.5mm 3.5mm 19.25mm 6 V
RS Stock No. 145-4496
Mfr. Part No.74ACT138SC
HK$2.779
Each (In a Tube of 48)
units
ACT Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V
RS Stock No. 806-3813
Mfr. Part No.MC74LVX138DR2G
HK$0.882
Each (On a Tape of 50)
units
LVX Decoder 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. 136-4884
Mfr. Part No.74HC138D,653
BrandNexperia
HK$1.359
Each (In a Pack of 100)
units
74HC Decoder, Demultiplexer 3-to-8 16 3 Single Ended Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 5.5 V
RS Stock No. 162-6504
Mfr. Part No.CD4511BPW
HK$2.12
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. 145-5314
Mfr. Part No.74AC138SC
HK$1.851
Each (In a Tube of 48)
units
AC 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. 178-3169
Mfr. Part No.HCTL-2017-A00
BrandBroadcom
HK$166.443
Each (In a Tube of 50)
units
- - - - - - - Through Hole PDIP 16 19.05 x 6.35 x 3.3mm 3.3mm 19.05mm -
RS Stock No. 178-9213
Mfr. Part No.SN74LVC139AD
HK$3.914
Each (In a Tube of 40)
units
LVC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 3.6 V
RS Stock No. 663-2111
Mfr. Part No.SN74HC42D
HK$6.198
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-10 1 - - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 756-3006
Mfr. Part No.TC74LCX138F(K,F)
BrandToshiba
HK$4.076
Each (In a Pack of 5)
units
74LCX Decoder 3-of-8 34 3 - Inverting Surface Mount SOP 16 10.8 x 5.3 x 1.5mm 1.5mm 10.8mm 3.6 V
RS Stock No. 663-0036
Mfr. Part No.CD74HC138E
HK$4.456
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 709-2712
Mfr. Part No.CD4555BEE4
HK$3.262
Each (In a Pack of 10)
units
4000 Decoder, Demultiplexer 1-of-4 2 1 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 18 V
RS Stock No. 125-0024
Mfr. Part No.MC14511BDG
HK$3.663
Each (In a Tube of 48)
units
MC140 Decoder, Driver, Latch 1-of-4 1 4 CMOS Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V
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