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. 145-4255
Mfr. Part No.MC74HC138ADTR2G
HK$0.77
Each (On a Reel of 2500)
units
HC Decoder, Demultiplexer 1-of-8 1 1 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 6 V
RS Stock No. 122-0107
Mfr. Part No.MC74HC138ADG
HK$2.185
Each (In a Tube of 48)
units
74HC 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. 806-1075
Mfr. Part No.NC7SZ18P6X
HK$2.99
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
New
RS Stock No. 184-4278
Mfr. Part No.MC74HC238ADG
HK$1.702
Each (In a Tube of 48)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 CMOS, LSTTL Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 166-1721
Mfr. Part No.NC7SZ19P6X
HK$0.719
Each (On a Reel of 3000)
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. 166-3142
Mfr. Part No.74LCX138BQX
HK$2.409
Each (On a Reel of 3000)
units
LCX Decoder, Demultiplexer 1-of-8 1 1 3 State Inverting Surface Mount DQFN 16 3.5 x 2.5 x 0.75mm 0.75mm 3.5mm 3.6 V
New
RS Stock No. 186-8869
Mfr. Part No.MC74HC238ADTG
HK$2.498
Each (In a Tube of 96)
units
HC Decoder, Demultiplexer 1-of-8 - - CMOS - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 6 V dc
RS Stock No. 166-1618
Mfr. Part No.MM74HC138MX
HK$1.793
Each (On a Reel of 2500)
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. 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. 806-3311
Mfr. Part No.MC14555BDG
HK$4.602
Each (In a Pack of 20)
units
MC140 Decoder, Demultiplexer 1-of-4 2 2 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V
RS Stock No. 145-4581
Mfr. Part No.74VHC139MTC
HK$2.534
Each (In a Tube of 94)
units
VHC Decoder, Demultiplexer 1-of-4 2 2 CMOS - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 5.5 V
RS Stock No. 806-2166
Mfr. Part No.MC74AC139DG
HK$2.716
Each (In a Pack of 25)
units
74AC Decoder, Demultiplexer 1-of-4 2 2 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
New
RS Stock No. 186-8795
Mfr. Part No.74AC139SC
HK$4.775
Each (In a Tube of 48)
units
AC Decoder, Demultiplexer 1-of-4 - - - - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 163-0615
Mfr. Part No.MC74LVX138DR2G
HK$1.025
Each (On a Reel of 2500)
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. 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. 806-1416
Mfr. Part No.MC74HC139ADG
HK$2.513
Each (In a Pack of 48)
units
74HC Decoder, Demultiplexer 1-of-4 2 2 3 State Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
New
RS Stock No. 186-9243
Mfr. Part No.MC74VHC138DG
HK$3.076
Each (In a Pack of 25)
units
HC Decoder 3-of-8 - - 3 State - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V dc
RS Stock No. 671-1548
Mfr. Part No.74ACT139SCX
HK$4.144
Each (In a Pack of 20)
units
ACT Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V
RS Stock No. 808-0089
Mfr. Part No.MC74HC138ADTR2G
HK$1.265
Each (In a Pack of 200)
units
HC Decoder, Demultiplexer 1-of-8 1 1 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 6 V