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. 170-5365
Mfr. Part No.74HC154PW,118
BrandNexperia
MYR3.917
Each (In a Pack of 10)
units
74HC Decoder, Demultiplexer 4-of-16 1 4 Single Ended Inverting Surface Mount TSSOP 24 7.9 x 4.5 x 0.95mm 0.95mm 7.9mm 6 V
RS Stock No. 663-0351
Mfr. Part No.CD74HC4511M
MYR3.64
Each (In a Pack of 5)
units
HC Decoder, Driver - 1 1 - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 145-0515
Mfr. Part No.CD74HC137PW
MYR2.425
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. 806-1075
Mfr. Part No.NC7SZ18P6X
MYR1.59
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
RS Stock No. 170-4897
Mfr. Part No.74LV4051PW,118
BrandNexperia
MYR1.435
Each (On a Reel of 2500)
units
74LV 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 6 V
RS Stock No. 662-8269
Mfr. Part No.SN74HCT138DR
MYR1.311
Each (In a Pack of 10)
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. 756-3078
Mfr. Part No.TC74VHC139FT(EL,K)
BrandToshiba
MYR3.742
Each (In a Pack of 10)
units
74VHC Decoder 2-of-4 17 1 - Inverting Surface Mount TSSOP 16 5.4 x 4.4 x 1mm 1mm 5.4mm 5.5 V
RS Stock No. 171-3318
Mfr. Part No.74VHC138FT
BrandToshiba
MYR0.396
Each (On a Reel of 2500)
units
74VHC Decoder 3-of-8 34 3 TTL Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
RS Stock No. 662-8272
Mfr. Part No.SN74HCT139DR
MYR1.63
Each (In a Pack of 10)
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. 178-3169
Mfr. Part No.HCTL-2017-A00
BrandBroadcom
MYR85.343
Each (In a Tube of 50)
units
- - - - - - - Through Hole PDIP 16 19.05 x 6.35 x 3.3mm 3.3mm 19.05mm -
RS Stock No. 169-7218
Mfr. Part No.74AHC138S16-13
MYR0.519
Each (On a Reel of 2500)
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. 136-4884
Mfr. Part No.74HC138D,653
BrandNexperia
MYR0.626
Each (In a Pack of 100)
units
74HC Decoder, Demultiplexer 3-to-8 16 3 Single Ended Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 5.5 V
RS Stock No. 761-4306
Mfr. Part No.74ACT138SCX
MYR2.04
Each (On a Tape of 10)
units
74ACT Decoder, Demultiplexer 1-of-8 15 3 - Inverting Surface Mount SOIC 16 10 x 6.198 x 1.499mm 1.499mm 10mm 5.5 V
RS Stock No. 144-9942
Mfr. Part No.CD74HC138E
MYR2.316
Each (In a Tube of 25)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 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. 759-9330
Mfr. Part No.FSAL200QSCX
MYR5.28
Each (In a Pack of 5)
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. 443-031
Mfr. Part No.SN74HC138N
MYR1.73
Each
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 186-9243
Mfr. Part No.MC74VHC138DG
MYR1.408
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. 539-8598
Mfr. Part No.TC74AC138P(F)
BrandToshiba
MYR3.93
Each (In a Pack of 5)
units
AC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.25 x 6.4 x 3.5mm 3.5mm 19.25mm 5.5 V
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