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. 186-9220
Mfr. Part No.MC74HC238ADTG
HK$2.544
Each (In a Pack of 25)
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. 166-1972
Mfr. Part No.74ACT139SCX
HK$1.86
Each (On a Reel of 2500)
units
ACT Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V
RS Stock No. 806-2163
Mfr. Part No.MC74AC138DG
HK$2.502
Each (In a Pack of 25)
units
74AC Decoder, Demultiplexer 1-of-8 1 3 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 803-0885
Mfr. Part No.74LCX138BQX
HK$4.81
Each (In a Pack of 20)
units
LCX Decoder, Demultiplexer 1-of-8 1 1 3 State Inverting Surface Mount DQFN 16 3.5 x 2.5 x 0.75mm 0.75mm 3.5mm 3.6 V
RS Stock No. 806-3309
Mfr. Part No.MC14543BDR2G
HK$3.07
Each (In a Pack of 25)
units
MC140 Decoder - 1 1 Single Ended Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V
RS Stock No. 163-0550
Mfr. Part No.MC14555BDG
HK$4.88
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. 671-1585
Mfr. Part No.74LCX138MTC
HK$4.45
Each (In a Pack of 5)
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. 166-1644
Mfr. Part No.FSAL200QSCX
HK$4.47
Each (On a Reel of 2500)
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. 806-3157
Mfr. Part No.MC14028BDG
HK$3.55
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. 145-4499
Mfr. Part No.74LCX138M
HK$4.47
Each (In a Tube of 48)
units
LCX Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 3.6 V
RS Stock No. 166-2474
Mfr. Part No.FSAL200MTCX
HK$4.273
Each (On a Reel of 2500)
units
TCX Demultiplexer, Multiplexer 1-of-2 4 2 CMOS - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 5.5 V
RS Stock No. 186-9382
Mfr. Part No.MC74HCT138ADG
HK$3.45
Each (In a Pack of 25)
units
HCT Decoder, Demultiplexer 1-of-8 - - TTL - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V dc
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. 808-4019
Mfr. Part No.MC10EP56DTG
HK$90.62
Each
units
ECL Multiplexer 1-of-2 4 2 ECL - Surface Mount TSSOP 20 6.6 x 4.5 x 1.05mm 1.05mm 6.6mm 5.5 V
RS Stock No. 145-4239
Mfr. Part No.MC74HC238ADR2G
HK$0.856
Each (On a Reel of 2500)
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. 806-2270
Mfr. Part No.MC74ACT138DG
HK$2.502
Each (In a Pack of 25)
units
74ACT Decoder, Demultiplexer 1-of-8 1 3 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V
RS Stock No. 145-5318
Mfr. Part No.74LCX138MTC
HK$3.63
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. 806-2273
Mfr. Part No.MC74ACT139DG
HK$3.59
Each (In a Pack of 25)
units
74ACT Decoder, Demultiplexer 1-of-4 2 2 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 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. 166-2401
Mfr. Part No.74ACT138SCX
HK$1.86
Each (On a Reel of 2500)
units
ACT Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 5.5 V