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. 662-6835
Mfr. Part No.CD4028BM96
HK$1.47
Each (In a Pack of 10)
units
4000 Decoder, Demultiplexer 1-of-10 1 - - Non-Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 18 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. 178-5545
Mfr. Part No.CD74HCT154M
HK$7.662
Each (In a Tube of 25)
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. 171-3433
Mfr. Part No.74VHC138FT
BrandToshiba
HK$1.603
Each (In a Pack of 50)
units
74VHC Decoder 3-of-8 34 3 TTL Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
RS Stock No. 145-1250
Mfr. Part No.SN74LS155AD
HK$8.696
Each (In a Tube of 40)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 Push-Pull Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 178-3140
Mfr. Part No.HCTL-2017-PLC
BrandBroadcom
HK$166.434
Each (In a Tube of 46)
units
CMOS, TTL Counter, Decoder 1-of-8 2 1 3 State Inverting Surface Mount PLCC 20 0.355 x 0.355 x 0.156in 3.96mm 9.02mm 5.5 V
RS Stock No. 663-0036
Mfr. Part No.CD74HC138E
HK$4.456
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-8 1 3 - Inverting Through Hole PDIP 16 19.3 x 6.35 x 4.57mm 4.57mm 19.3mm 6 V
RS Stock No. 808-0089
Mfr. Part No.MC74HC138ADTR2G
HK$1.265
Each (In a Pack of 200)
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
RS Stock No. 162-7398
Mfr. Part No.SN74HCT138PWR
HK$0.907
Each (On a Reel of 2000)
units
HCT 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. 756-3264
Mfr. Part No.TC7MBL3257CFK(EL)
BrandToshiba
HK$7.032
Each (In a Pack of 5)
units
- Demultiplexer 1-of-2 7 1 - Inverting Surface Mount VSSOP 16 4.25 x 3 x 0.8mm 0.8mm 4.25mm 3.6 V
RS Stock No. 122-0107
Mfr. Part No.MC74HC138ADG
HK$2.185
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. 662-8102
Mfr. Part No.SN74HC139DR
HK$2.13
Each (In a Pack of 10)
units
HC Decoder, Demultiplexer 1-of-4 2 1 - Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 6 V
RS Stock No. 756-3283
Mfr. Part No.TC7SB3157CFU(T5L,F
BrandToshiba
HK$2.652
Each (In a Pack of 10)
units
LVCMOS, LVTTL Demultiplexer 1-of-2 2 - - Inverting Surface Mount SSOP 6 2 x 1.25 x 0.9mm 0.9mm 2mm 5.5 V
RS Stock No. 136-4884
Mfr. Part No.74HC138D,653
BrandNexperia
HK$1.359
Each (In a Pack of 100)
units
74HC Decoder, Demultiplexer 3-to-8 16 3 Single Ended Inverting Surface Mount SO 16 10 x 4 x 1.45mm 1.45mm 10mm 5.5 V
RS Stock No. 152-6505
Mfr. Part No.74HC4052PW-Q100,11
BrandNexperia
HK$2.945
Each (In a Pack of 25)
units
74HC Demultiplexer, Multiplexer 2-of-8 5 2 CMOS, TTL Inverting Surface Mount TSSOP 16 5.1 x 4.5 x 0.95mm 0.95mm 5.1mm 11 V
RS Stock No. 671-1490
Mfr. Part No.74AC138SC
HK$3.832
Each (In a Pack of 5)
units
AC 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. 171-3447
Mfr. Part No.74VHC139FT
BrandToshiba
HK$1.613
Each (In a Pack of 50)
units
74VHC Decoder 2-of-4 17 1 TTL Inverting Surface Mount TSSOP 16 5 x 4.4 x 1mm 1mm 5mm 5.5 V
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
RS Stock No. 663-2420
Mfr. Part No.SN74LS155AD
HK$10.566
Each (In a Pack of 5)
units
LS Decoder, Demultiplexer 1-of-4, 1-of-8 1, 2 2 Push-Pull Inverting Surface Mount SOIC 16 9.9 x 3.91 x 1.58mm 1.58mm 9.9mm 5.25 V
RS Stock No. 541-9314
Mfr. Part No.TC74HC42AF(F)
BrandToshiba
HK$5.124
Each (In a Pack of 5)
units
HC Decoder, Demultiplexer 1-of-10 1 - - Inverting Surface Mount SOP 16 10.3 x 5.3 x 1.5mm 1.5mm 10.3mm 6 V
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