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Renesas Electronics Components Datasheet

HD74HC155 Datasheet

Dual 2-to-4-line Decoders/Demultiplexers

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HD74HC155
Dual 2-to-4-line Decoders/Demultiplexers
REJ03D0787-0200
(Previous ADE-205-453)
Rev.2.00
Oct 11, 2005
Description
This circuit features dual 1-line-to-4-line demultiplexer 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
High Speed Operation: tpd (A or B to Y) = 15 ns typ (CL = 50 pF)
High Output Current: Fanout of 10 LSTTL Loads
Wide Operating Voltage: VCC = 2 to 6 V
Low Input Current: 1 µA max
Low Quiescent Supply Current: ICC (static) = 4 µA max (Ta = 25°C)
Ordering Information
Part Name
Package Type
Package Code
(Previous Code)
Package
Abbreviation
HD74HC155P
DILP-16 pin
PRDP0016AE-B
(DP-16FV)
P
HD74HC155FPEL SOP-16 pin (JEITA)
PRSP0016DH-B
(FP-16DAV)
FP
Note: Please consult the sales office for the above package availability.
Taping Abbreviation
(Quantity)
EL (2,000 pcs/reel)
Rev.2.00, Oct 11, 2005 page 1 of 6


Renesas Electronics Components Datasheet

HD74HC155 Datasheet

Dual 2-to-4-line Decoders/Demultiplexers

No Preview Available !

HD74HC155
Function Table
2-line-to-4-line Decoder/1-line-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
Inputs
Select
Strobe
B A 2G
XXH
LLL
LHL
HL L
HH L
XXX
H : High level
L : Low level
X : Irrelevant
Data
2C
X
L
L
L
L
H
2Y0
H
L
H
H
H
H
3-line-to-8-line Decoder/1-line-to-8-line Demultiplexer
Inputs
Select
Strobe Data 0
CBA
G 2Y0
XXX H H
LLL L L
LLH L H
LHL L H
LHH L H
HLL L H
HLH L H
HHL L H
HHH L H
Notes: 1. C: inputs 1C and 2C connected together
2. G: inputs 1G and 2G connected together
3. X: irrelevant
1
2Y1
H
H
L
H
H
H
H
H
H
2
2Y2
H
H
H
L
H
H
H
H
H
Outputs
1Y1 1Y2
HH
HH
LH
HL
HH
HH
Outputs
2Y1 2Y2
HH
HH
LH
HL
HH
HH
1Y3
H
H
H
H
L
H
2Y3
H
H
H
H
L
H
Outputs
34567
2Y3 1Y0 1Y1 1Y2 1Y3
HHHHH
HHHHH
HHHHH
HHHHH
L HHHH
H L HHH
HH L HH
HHH L H
HHHH L
Rev.2.00, Oct 11, 2005 page 2 of 6


Part Number HD74HC155
Description Dual 2-to-4-line Decoders/Demultiplexers
Maker Renesas
Total Page 7 Pages
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