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Renesas Electronics Components Datasheet

HD74LS156 Datasheet

Dual 2-line-to-4-line Decoders / Demultiplexers

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HD74LS156 pdf
HD74LS156
Dual 2-line-to-4-line Decoders / Demultiplexers
(with open collector outputs)
REJ03D0441–0300
Rev.3.00
Jul.13.2005
This circuit features dual 1-line-to-4-line demultiprexer with individual strobes and common binary-address input.
When both sections are enabled by the strobes, the common binary-address inputs sequentially select and route
associated input data to the appropriate output of each section. The individual strobes permit activating or inhibiting
each of the 4-bit sections as desired. Data applied to input 1C is inverted through its outputs. The inverter following
the 1C data input permits use as a 3-to-8-line decoder or 1-to-8-line demultiplexer without external gating.
Features
Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74LS156P
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
P
HD74LS156RPEL SOP-16 pin (JEDEC)
PRSP0016DG-A
(FP-16DNV)
FP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,500 pcs/reel)
Pin Arrangement
Data 1C 1
Strobe 1G 2
Select Input B 3
1Y3 4
1Y2
Outputs
1Y1
5
6
1Y0 7
GND 8
1Y3 1G
1C
1Y2
1Y1 B
B
1Y0 A
A
2G
2C
2Y3
B 2Y2
B
A 2Y1
A
2Y0
16 VCC
15 Data 2C
14 Strobe 2G
13 Select Input A
12 2Y3
11 2Y2
Outputs
10 2Y1
9 2Y0
(Top view)
Rev.3.00, Jul.13.2005, page 1 of 6


Renesas Electronics Components Datasheet

HD74LS156 Datasheet

Dual 2-line-to-4-line Decoders / Demultiplexers

No Preview Available !

HD74LS156 pdf
HD74LS156
Function Table
2-to-4-line Decoder / 1-to-4-line Demultiplexer
Inputs
Select
Strobe
B A 1G
XXH
LLL
LHL
HL L
HH L
XXX
Data
1C
X
H
H
H
H
L
1Y0
H
L
H
H
H
H
Outputs
1Y1 1Y2
HH
HH
LH
HL
HH
HH
1Y3
H
H
H
H
L
H
Inputs
Select
Strobe
B A 2G
XXH
LLL
LHL
HL L
HH L
XXX
Data
2C
X
L
L
L
L
H
2Y0
H
L
H
H
H
H
Outputs
2Y1 2Y2
HH
HH
LH
HL
HH
HH
2Y3
H
H
H
H
L
H
3-to-8-line Decoder / 1-to-8-line Demultiplexer
Inputs
Outputs
Select
C*1 B
A
Strobe or
Data
(0)
(1)
(2)
(3)
(4)
G*2 2Y0 2Y1 2Y2 2Y3 1Y0
(5) (6) (7)
1Y1 1Y2 1Y3
XXX H H H H H H H H H
LLL L L HHHHHHH
LLH L H L H H H H HH
LHL L H H L H H H HH
LHH L H H H L H H H H
HL L L H H H H L H HH
HLH L H H H H H L HH
HH L L H H H H H H L H
HHH L H H H H H H H L
Notes: 1. C; input 1C and 2C connected together
2. G; inputs 1G and 2G connected together
3. H; high level, L; low level, X; irrelevant
Rev.3.00, Jul.13.2005, page 2 of 6


Part Number HD74LS156
Description Dual 2-line-to-4-line Decoders / Demultiplexers
Maker Renesas
Total Page 7 Pages
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