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. 144-9897
Mfr. Part No.SN74LS139AN
HK$4.924
Each (In a Tube of 25)
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. 242-122
Mfr. Part No.HD74LV138AT-E
HK$4.416
Each (In a Pack of 5)
units
74LV Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
RS Stock No. 663-2417
Mfr. Part No.SN74LS139AD
HK$6.382
Each (In a Pack of 5)
units
LS Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 465-2245
Mfr. Part No.TC74VHC139FT
BrandToshiba
HK$4.436
Each (In a Pack of 5)
units
VHC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
RS Stock No. 178-9207
Mfr. Part No.SN74LS139AD
HK$7.523
Each (In a Tube of 40)
units
LS Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 178-6959
Mfr. Part No.74HC154D,652
BrandNexperia
HK$5.729
Each (In a Tube of 30)
units
HC Decoder, Demultiplexer 1-of-16 1 2 - Inverting Surface Mount SOIC 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 6 V
RS Stock No. 483-6421
Mfr. Part No.74HC154D,652
BrandNexperia
HK$6.64
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-16 1 2 - Inverting Surface Mount SOIC 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 6 V
RS Stock No. 121-9249
Mfr. Part No.SN74LS247NE4
HK$11.231
Each (In a Tube of 25)
units
LS Decoder, Driver - 1 - Open Collector Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 825-3192
Mfr. Part No.74AC11138D
HK$21.34
Each (In a Pack of 5)
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. 662-7294
Mfr. Part No.CD74HCT238M96
HK$4.30
Each (In a Pack of 10)
units
HCT Decoder, Demultiplexer 1-of-8 1 3 - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.5 V
RS Stock No. 144-9942
Mfr. Part No.CD74HC138E
HK$3.526
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. 885-0705
Mfr. Part No.HT12D-20SOP
BrandHoltek
HK$4.975
Each (In a Tube of 38)
units
HT12 Decoder 1-of-8 1 8 CMOS - Surface Mount SOP 20 12.8 x 7.5 x 2.35mm 2.35mm 12.8mm 12 V
RS Stock No. 162-7453
Mfr. Part No.SN74LVC139APWR
HK$1.253
Each (On a Reel of 2000)
units
LVC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1.15mm 1.15mm 5mm 3.6 V
RS Stock No. 178-5190
Mfr. Part No.M74HC151YTTR
HK$1.20
Each (On a Reel of 2500)
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. 168-8787
Mfr. Part No.M74HC151YRM13TR
HK$1.295
Each (On a Reel of 2500)
units
HC Multiplexer 1 x 8:1 8 1 CMOS - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm 6 V
RS Stock No. 186-8793
Mfr. Part No.74AC138MTC
HK$3.08
Each (In a Tube of 96)
units
AC Decoder, Demultiplexer 1-of-8 - - - - Surface Mount TSSOP 16 5 x 4.5 x 0.95mm 0.95mm 5mm 6 V
RS Stock No. 165-5506
Mfr. Part No.HCF4051YM013TR
HK$1.245
Each (On a Reel of 2500)
units
- - - - - - - Surface Mount SOIC 16 10 x 4 x 1.65mm 1.65mm 10mm -
RS Stock No. 162-7411
Mfr. Part No.SN74LS155ANE4
HK$7.764
Each (In a Tube of 25)
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. 806-3157
Mfr. Part No.MC14028BDG
HK$2.646
Each (In a Pack of 25)
units
MC140 Decoder 1-of-10 1 4 - Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V
RS Stock No. 171-3360
Mfr. Part No.74VHCT138AFT
BrandToshiba
HK$1.075
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
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