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. 806-1413
Mfr. Part No.MC74HC138ADR2G
$0.254
Each (On a Tape of 50)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 3 State Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 122-0107
Mfr. Part No.MC74HC138ADG
$0.154
Each (In a Tube of 48)
units
74HC 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. 689-8709
Mfr. Part No.MC74HC138ADG
$0.566
Each (In a Pack of 5)
units
74HC 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. 170-3561
Mfr. Part No.MC74HC138ADR2G
$0.189
Each (On a Reel of 2500)
units
74HC Decoder, Demultiplexer 1-of-8 1 3 3 State Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 802-1358
Mfr. Part No.74VHC138M
$0.80
Each (In a Tube of 48)
units
VHC Decoder, Demultiplexer 3-to-8 - 1 - - Surface Mount SOIC 16 10 x 3.988 x 1.499mm 1.499mm 10mm 5.5 V
RS Stock No. 806-2166
Mfr. Part No.MC74AC139DG
$0.767
Each (In a Pack of 25)
units
74AC Decoder, Demultiplexer 1-of-4 2 2 CMOS Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V
RS Stock No. 145-4255
Mfr. Part No.MC74HC138ADTR2G
$0.159
Each (On a Reel of 2500)
units
HC Decoder, Demultiplexer 1-of-8 1 1 CMOS Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 6 V
New
RS Stock No. 186-8881
Mfr. Part No.MC74VHC138DG
$0.625
Each (In a Tube of 48)
units
HC Decoder 3-of-8 - - 3 State - Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 6 V dc
RS Stock No. 803-0885
Mfr. Part No.74LCX138BQX
$0.382
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. 806-3737
Mfr. Part No.MC74LCX138DR2G
$0.464
Each (On a Tape of 25)
units
LCX Decoder, Demultiplexer 3-of-8 1 3 Single Ended Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 3.6 V
RS Stock No. 908-0800
Mfr. Part No.MC100EP56DWG
$16.14
Each
units
ECL Decoder 1-of-2 2 - ECL - Surface Mount SOIC 20 12.95 x 7.6 x 2.4mm 2.4mm 12.95mm -
RS Stock No. 806-1508
Mfr. Part No.MC74HC238ADR2G
$0.334
Each (In a Pack of 50)
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. 803-0958
Mfr. Part No.74VHC139MTC
$0.341
Each (In a Pack of 47)
units
VHC Decoder, Demultiplexer 1-of-4 2 2 CMOS - Surface Mount TSSOP 16 5 x 4.4 x 0.9mm 0.9mm 5mm 5.5 V
New
RS Stock No. 186-8793
Mfr. Part No.74AC138MTC
$0.701
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. 145-4496
Mfr. Part No.74ACT138SC
$0.335
Each (In a Tube of 48)
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
RS Stock No. 125-0024
Mfr. Part No.MC14511BDG
$0.732
Each (In a Tube of 48)
units
MC140 Decoder, Driver, Latch 1-of-4 1 4 CMOS Non-Inverting Surface Mount SOIC 16 10 x 4 x 1.5mm 1.5mm 10mm 18 V
RS Stock No. 739-5175
Mfr. Part No.NC7SZ19P6X
$0.434
Each (In a Pack of 5)
units
TinyLogic UHS Decoder, Demultiplexer 1-of-2 1 1 - Non-Inverting Surface Mount SC-70 6 2 x 1.25 x 1mm 1mm 2mm 5.5 V
RS Stock No. 671-1740
Mfr. Part No.MM74HC138M
$0.732
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
New
RS Stock No. 186-9148
Mfr. Part No.74AC138MTC
$0.728
Each (In a Pack of 25)
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. 806-3917
Mfr. Part No.MC74VHC139DTR2G
$0.282
Each (In a Pack of 25)
units
VHC Decoder, Demultiplexer 2-of-4 2 2 Buffer, 3 State Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 1.05mm 1.05mm 5.1mm 5.5 V