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. 671-1740
Mfr. Part No.MM74HC138M
HK$4.426
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 170-5365
Mfr. Part No.74HC154PW,118
BrandNexperia
HK$5.311
Each (In a Pack of 10)
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. 145-5836
Mfr. Part No.74AC11138PW
HK$17.545
Each (In a Tube of 90)
units
AC Decoder, Demultiplexer 3-of-8 1 3 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 5.5 V
RS Stock No. 663-0509
Mfr. Part No.CD74HCT154M
HK$6.478
Each (In a Pack of 5)
units
HCT Decoder, Demultiplexer 1-of-16 1 2 - Inverting Surface Mount SOIC 24 15.4 x 7.52 x 2.35mm 2.35mm 15.4mm 5.5 V
RS Stock No. 483-6718
Mfr. Part No.74HCT238D,652
BrandNexperia
HK$2.593
Each (In a Pack of 10)
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
RS Stock No. 170-5417
Mfr. Part No.74LV4051PW,118
BrandNexperia
HK$4.38
Each (In a Pack of 10)
units
74LV 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 6 V
RS Stock No. 145-4248
Mfr. Part No.MC74LCX139DTR2G
HK$0.882
Each (On a Reel of 2500)
units
LCX Decoder, Demultiplexer 2-of-4 2 2 Single Ended Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 3.6 V
RS Stock No. 170-5337
Mfr. Part No.HEF4051BT,653
BrandNexperia
HK$2.573
Each (In a Pack of 25)
units
HEF Demultiplexer, Multiplexer 1-of-8 1 3 Single Ended Non-Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 15 V
RS Stock No. 145-0025
Mfr. Part No.CD4555BEE4
HK$2.135
Each (In a Tube of 25)
units
4000 Decoder, Demultiplexer 1-of-4 2 1 - Non-Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 18 V
RS Stock No. 662-8617
Mfr. Part No.SN74LVC138ADR
HK$2.367
Each (In a Pack of 10)
units
LVC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 3.6 V
RS Stock No. 807-2599
Mfr. Part No.SN74AHCT139N
HK$2.585
Each (In a Pack of 25)
units
HCT Decoder, Demultiplexer 2-of-4 2 2 3 State Inverting Through Hole PDIP 16 19.69 x 6.6 x 4.57mm 4.57mm 19.69mm 5.5 V
RS Stock No. 146-0367
Mfr. Part No.74HC138PW,112
BrandNexperia
HK$1.049
Each (In a Tube of 96)
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. 662-8613
Mfr. Part No.SN74LVC138ADBR
HK$2.414
Each (In a Pack of 10)
units
LVC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount SSOP 16 6.2 x 5.3 x 1.95mm 1.95mm 6.2mm 3.6 V
RS Stock No. 662-7241
Mfr. Part No.CD74HCT137MT
HK$11.80
Each (In a Pack of 5)
units
HCT Decoder, Demultiplexer 1-of-8 1 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.5 V
RS Stock No. 184-4278
Mfr. Part No.MC74HC238ADG
HK$1.702
Each (In a Tube of 48)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 CMOS, LSTTL Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 171-3478
Mfr. Part No.74VHC238FT
BrandToshiba
HK$1.613
Each (In a Pack of 50)
units
74VHC Decoder 3-of-8 42 3 TTL Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
RS Stock No. 184-4262
Mfr. Part No.MC14543BDG
HK$2.344
Each (In a Tube of 48)
units
4000 Decoder - 1 1 Single Ended Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm +18 V
RS Stock No. 406-3409
Mfr. Part No.TC74LCX138FT
BrandToshiba
HK$11.64
Each
units
LCX Decoder, Demultiplexer 1-of-8 1 3 - Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 3.6 V
RS Stock No. 806-3740
Mfr. Part No.MC74LCX139DTR2G
HK$2.178
Each (On a Tape of 50)
units
LCX Decoder, Demultiplexer 2-of-4 2 2 Single Ended Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 3.6 V
RS Stock No. 163-0573
Mfr. Part No.MC74AC138DG
HK$1.755
Each (In a Tube of 48)
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
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