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. 304-942
Mfr. Part No.SN74LS259BN
HK$9.31
Each
units
LS - - 1 1 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 145-0381
Mfr. Part No.SN74LS259BN
HK$6.991
Each (In a Tube of 25)
units
LS - - 1 1 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.25 V
RS Stock No. 305-406
Mfr. Part No.SN7447AN
HK$25.51
Each
units
74 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. 368-4724
Mfr. Part No.SN7447AN
HK$21.682
Each (In a Tube of 25)
units
74 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. 662-7244
Mfr. Part No.CD74HCT138M96
HK$3.494
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. 145-0082
Mfr. Part No.CD74HCT138M
HK$3.217
Each (In a Tube of 40)
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. 145-6398
Mfr. Part No.CD74HCT138M96
HK$2.187
Each (On a Reel of 2500)
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. 833-709
Mfr. Part No.CD74HCT138M
HK$6.07
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. 144-9994
Mfr. Part No.SN74HCT138NE4
HK$1.836
Each (In a Tube of 25)
units
HCT Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 V
RS Stock No. 807-2466
Mfr. Part No.CD74HC4511E
HK$5.697
Each (In a Pack of 25)
units
HC Decoder, Driver - 1 4 CMOS Non-Inverting Through Hole PDIP 16 19.69 x 6.6 x 4.57mm 4.57mm 19.69mm 6 V
RS Stock No. 527-158
Mfr. Part No.SN74HC138D
HK$2.553
Each (In a Tube of 40)
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. 526-931
Mfr. Part No.SN74HC138DR
HK$2.67
Each (In a Pack of 25)
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. 709-1983
Mfr. Part No.SN74HCT138NE4
HK$5.591
Each (In a Pack of 10)
units
HCT Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 5.5 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. 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. 647-980
Mfr. Part No.CD74ACT238E
HK$3.55
Each
units
ACT 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 5.5 V
RS Stock No. 885-0702
Mfr. Part No.HT12D-18DIP
BrandHoltek
HK$6.675
Each (In a Tube of 25)
units
HT12 Decoder 1-of-8 1 8 CMOS - Through Hole PDIP 18 23.37 x 7.11 x 4.95mm 4.95mm 23.37mm 12 V
RS Stock No. 170-8040
Mfr. Part No.74HC154D,653
BrandNexperia
HK$2.94
Each (On a Reel of 1000)
units
74HC Decoder, Demultiplexer 4-of-16 1 2 Single Ended Inverting Surface Mount SO 24 15.6 x 7.6 x 2.45mm 2.45mm 15.6mm 6 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
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