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. 662-8430
Mfr. Part No.SN74LV138APWR
HK$2.756
Each (In a Pack of 10)
units
LV 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. 923-2344
Mfr. Part No.SN74LS47N
HK$12.328
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. 162-4292
Mfr. Part No.SN74LS145N
HK$5.658
Each (In a Tube of 25)
units
LS Decoder, Driver 1-of-10 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. 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. 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. 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. 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. 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. 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. 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. 162-7426
Mfr. Part No.SN74LV138APWR
HK$0.964
Each (On a Reel of 2000)
units
LV 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. 307-581
Mfr. Part No.SN74LS47N
HK$17.78
Each
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. 170-8040
Mfr. Part No.74HC154D,653
BrandNexperia
HK$2.947
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. 303-624
Mfr. Part No.SN74LS145N
HK$16.25
Each
units
LS Decoder, Driver 1-of-10 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. 170-7999
Mfr. Part No.HEF4053BT,653
BrandNexperia
HK$1.079
Each (On a Reel of 2500)
units
HEF Demultiplexer, Multiplexer 1-of-2 3 3 Single Ended Non-Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 15 V
RS Stock No. 178-3169
Mfr. Part No.HCTL-2017-A00
BrandBroadcom
HK$166.443
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. 638-037
Mfr. Part No.SN74ALS138AN
HK$15.92
Each
units
ALS 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. 663-2818
Mfr. Part No.SN74LVC138APW
HK$3.655
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
New
RS Stock No. 186-8869
Mfr. Part No.MC74HC238ADTG
HK$2.498
Each (In a Tube of 96)
units
HC Decoder, Demultiplexer 1-of-8 - - CMOS - Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 6 V dc
RS Stock No. 170-7971
Mfr. Part No.HEF4013BT,653
BrandNexperia
HK$0.798
Each (On a Reel of 2500)
units
HEF D Type - 2 - Buffer - Surface Mount SO 14 8.75 x 4 x 1.45mm 1.45mm 8.75mm 15 V
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