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. 806-2166
Mfr. Part No.MC74AC139DG
MYR1.71
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
RS Stock No. 671-1740
Mfr. Part No.MM74HC138M
MYR2.62
Each (In a Pack of 5)
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. 756-3264
Mfr. Part No.TC7MBL3257CFK(EL)
BrandToshiba
MYR3.61
Each (In a Pack of 5)
units
- Demultiplexer 1-of-2 7 1 - Inverting Surface Mount VSSOP 16 4.25 x 3 x 0.8mm 0.8mm 4.25mm 3.6 V
RS Stock No. 880-5282
Mfr. Part No.HCF4051YM013TR
MYR1.33
Each (In a Pack of 50)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 171-3360
Mfr. Part No.74VHCT138AFT
BrandToshiba
MYR0.61
Each (On a Reel of 2500)
units
74VHC Decoder 3-of-8 36 3 TTL Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
RS Stock No. 166-1644
Mfr. Part No.FSAL200QSCX
MYR2.224
Each (On a Reel of 2500)
units
SCX Demultiplexer, Multiplexer 1-of-2 4 2 CMOS - Surface Mount QSOP 16 5 x 3.9 x 1.357mm 1.357mm 5mm 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. 833-709
Mfr. Part No.CD74HCT138M
MYR3.07
Each
units
HCT 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. 796-7953
Mfr. Part No.CD4515BM
MYR3.53
Each (In a Pack of 25)
units
CD4000 Decoder, Demultiplexer 1-of-16 1 4 - Inverting Surface Mount SOIC 24 15.6 x 7.6 x 2.35mm 2.35mm 15.6mm 18 V
RS Stock No. 165-5506
Mfr. Part No.HCF4051YM013TR
MYR1.681
Each (On a Reel of 2500)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 663-0045
Mfr. Part No.CD74HC138M
MYR2.58
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 860-7309
Mfr. Part No.M74HC151YTTR
MYR1.42
Each (In a Pack of 20)
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. 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. 662-6835
Mfr. Part No.CD4028BM96
MYR1.45
Each (In a Pack of 10)
units
4000 Decoder, Demultiplexer 1-of-10 1 0 - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 18 V
RS Stock No. 663-1928
Mfr. Part No.SN74HC138PW
MYR1.33
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 6 V
RS Stock No. 145-7828
Mfr. Part No.74AC11138D
MYR9.69
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. 186-8796
Mfr. Part No.74ACT139MTC
MYR2.24
Each (In a Tube of 96)
units
ACT Decoder, Demultiplexer 1-of-4 - 2 - - Surface Mount TSSOP 16 5 x 4.5 x 0.95mm 0.95mm 5mm 5.5 V
RS Stock No. 186-8795
Mfr. Part No.74AC139SC
MYR2.256
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. 145-0465
Mfr. Part No.CD4028BE
MYR1.418
Each (In a Tube of 25)
units
4000 Decoder, Demultiplexer 1-of-10 1 0 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 18 V