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54LS257A Arkusz danych(PDF) 5 Page - Texas Instruments

Numer części 54LS257A
Szczegółowy opis  TRI-STATE(RM) Quad 2-Data Selectors/Multiplexers
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Producent  TI1 [Texas Instruments]
Strona internetowa  http://www.ti.com
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54LS257A Arkusz danych(HTML) 5 Page - Texas Instruments

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’LS258B Electrical Characteristics
over recommended operating free air temperature range (unless otherwise noted) (Continued)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
(Note 1)
IIL
Low Level Input
VCC e Max
Select
b
08
mA
Current
VI e 04V
Other
b
04
IOZH
Off-State Output Current
VCC e Max VO e 27V
with High Level Output
VIH e Min VIL e Max
20
m
A
Voltage Applied
IOZL
Off-State Output Current
VCC e Max VO e 04V
with Low Level Output
VIH e Min VIL e Max
b
20
m
A
Voltage Applied
IOS
Short Circuit
VCC e Max
DM54
b
20
b
100
mA
Output Current
(Note 2)
DM74
b
20
b
100
ICCH
Supply Current with
VCC e Max (Note 3)
41
7
mA
Outputs High
ICCL
Supply Current with
VCC e Max (Note 3)
914
mA
Outputs Low
ICCZ
Supply Current with
VCC e Max (Note 3)
12
19
mA
Outputs Disabled
Note 1
All typicals are at VCC e 5V TA e 25 C
Note 2
Not more than one output should be shorted at a time and the duration should not exceed one second
Note 3
ICC is measured with all outputs open and all possible inputs grounded while achieving the stated output conditions
’LS258B Switching Characteristics
at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
From (Input)
RL e 667X
Symbol
Parameter
To (Output)
CL e 45 pF
CL e 150 pF
Units
Min
Max
Min
Max
tPLH
Propagation Delay Time
Data to
18
27
ns
Low to High Level Output
Output
tPHL
Propagation Delay Time
Data to
18
27
ns
High to Low Level Output
Output
tPLH
Propagation Delay Time
Select to
28
35
ns
Low to High Level Output
Output
tPHL
Propagation Delay Time
Select to
35
42
ns
High to Low Level Output
Output
tPZH
Output Enable Time
Output
15
27
ns
to High Level Output
Control to Y
tPZL
Output Enable Time
Output
28
38
ns
to Low Level Output
Control to Y
tPHZ
Output Disable Time from
Output
26
ns
High Level Output (Note 4)
Control to Y
tPLZ
Output Disable Time from
Output
25
ns
Low Level Output (Note 4)
Control to Y
Note 4
CL e 5 pF
4


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