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. 539-9513
Mfr. Part No.TC74HC138AP(F)
BrandToshiba
HK$3.84
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.25 x 6.4 x 3.5mm 3.5mm 19.25mm 6 V
RS Stock No. 781-2762
Mfr. Part No.74HC138PW,112
BrandNexperia
HK$1.894
Each (In a Pack of 48)
units
74HC Decoder, Demultiplexer 3-of-8 1 3 - Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 6 V
RS Stock No. 483-6392
Mfr. Part No.74HC137D,652
BrandNexperia
HK$3.903
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 1 - Inverting Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 6 V
RS Stock No. 178-9169
Mfr. Part No.SN74ALS139DR
HK$9.056
Each (In a Tube of 40)
units
ALS 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. 170-7982
Mfr. Part No.74HC4051PW,118
BrandNexperia
HK$0.881
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. 798-8897
Mfr. Part No.74AHC138S16-13
HK$1.411
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. 152-6473
Mfr. Part No.74HC4052PW-Q100,11
BrandNexperia
HK$1.16
Each (On a Reel of 2500)
units
74HC Demultiplexer, Multiplexer 2-of-8 5 2 CMOS, TTL Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 11 V
RS Stock No. 145-5318
Mfr. Part No.74LCX138MTC
HK$1.864
Each (In a Tube of 94)
units
LCX Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 3.6 V
RS Stock No. 633-969
Mfr. Part No.CD74HCT42E
HK$9.72
Each
units
HCT Decoder, Demultiplexer 1-of-10 1 - - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V
RS Stock No. 186-8849
Mfr. Part No.MC14511BDR2G
HK$1.68
Each (On a Reel of 2500)
units
- Decoder - - - NPN - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 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
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. 781-2831
Mfr. Part No.74HC4514D,652
BrandNexperia
HK$11.375
Each (In a Pack of 10)
units
74HC Decoder, Demultiplexer 4-of-16 1 2 - Non-Inverting Surface Mount SOIC 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 6 V
RS Stock No. 541-9695
Mfr. Part No.TC4511BP(F)
BrandToshiba
HK$10.086
Each (In a Pack of 5)
units
4000 Decoder, Driver - 1 1 - Non-Inverting Through Hole PDIP 16 19.25 x 6.4 x 3.5mm 3.5mm 19.25mm 18 V
RS Stock No. 663-2818
Mfr. Part No.SN74LVC138APW
HK$3.222
Each (In a Pack of 10)
units
LVC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 3.6 V
RS Stock No. 145-4056
Mfr. Part No.MC100EP56DWG
HK$63.724
Each (In a Tube of 38)
units
ECL Decoder 1-of-2 2 - ECL - Surface Mount SOIC 20 12.95 x 7.6 x 2.4mm 2.4mm 12.95mm -
RS Stock No. 170-4874
Mfr. Part No.74HC154PW,118
BrandNexperia
HK$2.448
Each (On a Reel of 2500)
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. 663-2420
Mfr. Part No.SN74LS155AD
HK$10.566
Each (In a Pack of 5)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 Push-Pull Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 163-0550
Mfr. Part No.MC14555BDG
HK$2.867
Each (In a Tube of 48)
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. 178-6977
Mfr. Part No.74HCT238D,652
BrandNexperia
HK$2.73
Each (In a Tube of 50)
units
HCT Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.45mm 1.45mm 10mm 5.5 V
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