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. 304-065
Mfr. Part No.SN7445N
HK$20.99
Each
units
74 Decoder, Driver 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. 144-9900
Mfr. Part No.SN74HC139N
HK$3.049
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. 880-5282
Mfr. Part No.HCF4051YM013TR
HK$2.78
Each (In a Pack of 50)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 145-6686
Mfr. Part No.SN74F138D
HK$4.60
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. 125-0024
Mfr. Part No.MC14511BDG
HK$4.12
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
RS Stock No. 816-8775
Mfr. Part No.74LVC1G18GW,125
BrandNexperia
HK$2.69
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. 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. 162-7468
Mfr. Part No.SN74LVC1G19DBVR
HK$0.83
Each (On a Reel of 3000)
units
LVC Decoder, Demultiplexer 1-of-2 1 1 - 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. 178-9167
Mfr. Part No.CD74HCT238M96
HK$4.789
Each (In a Tube of 40)
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. 145-0515
Mfr. Part No.CD74HC137PW
HK$4.19
Each (In a Tube of 90)
units
HC Decoder, Demultiplexer 1-of-8 1 3 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 6 V
RS Stock No. 186-9148
Mfr. Part No.74AC138MTC
HK$3.198
Each (In a Pack of 25)
units
AC Decoder, Demultiplexer 1-of-8 - - - - Surface Mount TSSOP 16 5 x 4.5 x 0.95mm 0.95mm 5mm 6 V
RS Stock No. 162-7453
Mfr. Part No.SN74LVC139APWR
HK$1.32
Each (On a Reel of 2000)
units
LVC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 3.6 V
RS Stock No. 638-037
Mfr. Part No.SN74ALS138AN
HK$8.39
Each
units
ALS 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. 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. 406-3409
Mfr. Part No.TC74LCX138FT
BrandToshiba
HK$2.76
Each
units
LCX Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 3.6 V
RS Stock No. 806-3157
Mfr. Part No.MC14028BDG
HK$3.55
Each (In a Pack of 25)
units
MC140 Decoder 1-of-10 1 4 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V
RS Stock No. 803-0995
Mfr. Part No.74VHCT138AMTC
HK$4.88
Each (In a Pack of 47)
units
VHC Decoder, Demultiplexer 1-of-8 1 1 - - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 5.5 V
RS Stock No. 184-4262
Mfr. Part No.MC14543BDG
HK$3.15
Each (In a Tube of 48)
units
4000 Decoder - 1 1 Single Ended Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm +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. 162-4150
Mfr. Part No.CD74HCT138E
HK$4.83
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
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