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. 163-0542
Mfr. Part No.MC14511BDWR2G
HK$2.732
Each (On a Reel of 1000)
units
MC140 Decoder, Driver, Latch 1-of-4 1 4 CMOS Non-Inverting Surface Mount SOIC W 16 10.45 x 7.6 x 2.4mm 2.4mm 10.45mm 18 V
RS Stock No. 170-4872
Mfr. Part No.74HC238PW,118
BrandNexperia
HK$1.36
Each (On a Reel of 2500)
units
74HC Decoder, Demultiplexer 3-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. 162-7465
Mfr. Part No.SN74LVC1G139DCTT
HK$5.282
Each (On a Reel of 250)
units
LVC Decoder, Demultiplexer 1-of-4 1 - - Inverting Surface Mount SSOP 8 2.95 x 2.8 x 1.29mm 1.29mm 2.95mm 5.5 V
RS Stock No. 662-8263
Mfr. Part No.SN74HCT138PWR
HK$3.05
Each (In a Pack of 10)
units
HCT 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. 145-7828
Mfr. Part No.74AC11138D
HK$17.552
Each (In a Tube of 40)
units
AC Decoder, Demultiplexer 3-of-8 9 3 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10.5mm 5.5 V
RS Stock No. 145-0138
Mfr. Part No.CD4056BM
HK$2.375
Each (In a Tube of 40)
units
4000 Decoder, Driver - 1 1 - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 18 V
RS Stock No. 178-9194
Mfr. Part No.SN74AHC138D
HK$2.295
Each (In a Tube of 40)
units
AHC 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. 663-2410
Mfr. Part No.SN74LS145D
HK$8.362
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. 709-2655
Mfr. Part No.SN74LS155ANE4
HK$10.834
Each (In a Pack of 5)
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. 171-3382
Mfr. Part No.74HC138D
BrandToshiba
HK$0.973
Each (On a Reel of 2500)
units
74HC Decoder 3-of-8 34 3 CMOS Inverting Surface Mount SOIC 16 10.2 x 3.9 x 1.38mm 1.38mm 10.2mm 6 V
RS Stock No. 178-5190
Mfr. Part No.M74HC151YTTR
HK$2.081
Each (On a Reel of 2500)
units
HC Multiplexer 1 x 8:1 8 1 CMOS - Surface Mount TSSOP 16 5.1 x 4.48 x 1.05mm 1.05mm 5.1mm 6 V
RS Stock No. 162-4150
Mfr. Part No.CD74HCT138E
HK$3.085
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
RS Stock No. 170-7997
Mfr. Part No.74HCT4051D,118
BrandNexperia
HK$1.161
Each (On a Reel of 2500)
units
74HCT Demultiplexer, Multiplexer 1-of-8 1 3 Single Ended Non-Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 5.5 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. 162-7411
Mfr. Part No.SN74LS155ANE4
HK$7.764
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. 716-0607
Mfr. Part No.HCTL-2017-A00
BrandBroadcom
HK$140.41
Each
units
- - - - - - - Through Hole PDIP 16 19.05 x 6.35 x 3.3mm 3.3mm 19.05mm -
RS Stock No. 638-043
Mfr. Part No.SN74ALS139N
HK$15.77
Each
units
ALS Decoder, Demultiplexer 1-of-4 2 1 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V
RS Stock No. 739-5175
Mfr. Part No.NC7SZ19P6X
HK$2.80
Each (In a Pack of 5)
units
TinyLogic UHS Decoder, Demultiplexer 1-of-2 1 1 - Non-Inverting Surface Mount SC-70 6 2 x 1.25 x 1mm 1mm 2mm 5.5 V
RS Stock No. 806-3260
Mfr. Part No.MC14511BDWR2G
HK$4.351
Each (On a Tape of 20)
units
MC140 Decoder, Driver, Latch 1-of-4 1 4 CMOS Non-Inverting Surface Mount SOIC W 16 10.45 x 7.6 x 2.4mm 2.4mm 10.45mm 18 V
RS Stock No. 145-2971
Mfr. Part No.MC74ACT138DG
HK$2.391
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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