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. 709-2034
Mfr. Part No.CD74HC238E
MYR2.091
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. 178-9194
Mfr. Part No.SN74AHC138D
MYR1.35
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. 145-5836
Mfr. Part No.74AC11138PW
MYR12.812
Each (In a Tube of 90)
units
AC Decoder, Demultiplexer 3-of-8 1 3 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 5.5 V
RS Stock No. 709-2655
Mfr. Part No.SN74LS155AN
MYR6.426
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. 662-8102
Mfr. Part No.SN74HC139DR
MYR1.316
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 308-253
Mfr. Part No.SN74LS139AN
MYR3.86
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. 171-3291
Mfr. Part No.74LCX138FT
BrandToshiba
MYR0.425
Each (On a Reel of 2500)
units
74LCX Decoder 3-of-8 34 3 CMOS Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 3.6 V
RS Stock No. 756-3283
Mfr. Part No.TC7SB3157CFU(T5L,F
BrandToshiba
MYR2.808
Each (In a Pack of 10)
units
LVCMOS, LVTTL Demultiplexer 1-of-2 2 - - Inverting Surface Mount SSOP 6 2 x 1.25 x 0.9mm 0.9mm 2mm 5.5 V
RS Stock No. 798-8897
Mfr. Part No.74AHC138S16-13
MYR1.48
Each (In a Pack of 25)
units
AHC Decoder, Demultiplexer 3-of-8 8 6 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V
RS Stock No. 145-1239
Mfr. Part No.SN74AHCT138PW
MYR1.35
Each (In a Tube of 90)
units
AHCT 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. 162-7468
Mfr. Part No.SN74LVC1G19DBVR
MYR0.397
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. 671-1490
Mfr. Part No.74AC138SC
MYR2.45
Each (In a Pack of 5)
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. 756-3075
Mfr. Part No.TC74VHC138F(K,F)
BrandToshiba
MYR3.976
Each (In a Pack of 5)
units
74VHC Decoder 3-of-8 34 3 - Inverting Surface Mount SOP 16 10.8 x 5.3 x 1.5mm 1.5mm 10.8mm 5.5 V
RS Stock No. 166-1506
Mfr. Part No.74LVC138ABQ,115
BrandNexperia
MYR0.495
Each (On a Reel of 3000)
units
LVC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount DHVQFN 16 3.6 x 2.6 x 0.95mm 0.95mm 3.6mm 3.6 V
RS Stock No. 662-8755
Mfr. Part No.SN74LVC1G18DBVR
MYR1.12
Each (In a Pack of 10)
units
LVC Demultiplexer 1-of-2 1 1 3 State 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. 145-4584
Mfr. Part No.74VHCT138AMTC
MYR2.33
Each (In a Tube of 94)
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. 170-7982
Mfr. Part No.74HC4051PW,118
BrandNexperia
MYR0.412
Each (On a Reel of 2500)
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 10 V
RS Stock No. 170-5438
Mfr. Part No.74LVC138APW,118
BrandNexperia
MYR1.30
Each (In a Pack of 25)
units
74LVC 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 3.6 V
RS Stock No. 528-195
Mfr. Part No.SN74HCT139D
MYR1.461
Each (In a Tube of 40)
units
HCT 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. 483-6487
Mfr. Part No.74HC238D,652
BrandNexperia
MYR1.98
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V
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