www.docs.chipfind.ru
2005 Fairchild Semiconductor Corporation
DS011552
www.fairchildsemi.com
February 1993
Revised April 2005
7
4
L
VX24
4
Low V
o
l
t
age Oct
a
l Buff
er/
L
i
ne
Dri
ver
wit
h
3-ST
A
T
E
Out
put
s
74LVX244
Low Voltage Octal Buffer/Line Driver with
3-STATE Outputs
General Description
The LVX244 is an octal non-inverting buffer and line driver
designed to be employed as a memory address driver,
clock driver and bus oriented transmitter or receiver which
provides improved PC board density. The inputs tolerate up
to 7V allowing interface of 5V systems to 3V systems.
Features
s
Input voltage translation from 5V to 3V
s
Ideal for low power/low noise 3.3V applications
s
Guaranteed simultaneous switching noise level and
dynamic threshold performance
Ordering Code:
Devices also available in Tape and Reel. Specify by appending suffix letter "X" to the ordering code.
Pb-Free package per JEDEC J-STD-020B.
Logic Symbol
IEEE/IEC
Connection Diagram
Pin Descriptions
Truth Tables
H
HIGH Voltage Level
L
LOW Voltage Level
X
Immaterial
Z
High Impedance
Order Number
Package Number
Package Description
74LVX244M
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
74LVX244SJ
M20D
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74LVX244MTC
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Pin Names
Description
OE
1
, OE
2
3-STATE Output Enable Inputs
I
0
I
7
Inputs
O
0
O
7
Outputs
Inputs
Outputs
OE
1
I
n
(Pins 12, 14, 16, 18)
L
L
L
L
H
H
H
X
Z
Inputs
Outputs
OE
2
I
n
(Pins 3, 5, 7, 9)
L
L
L
L
H
H
H
X
Z
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2
74
L
VX244
Absolute Maximum Ratings
(Note 1)
Recommended Operating
Conditions
(Note 2)
Note 1: The "Absolute Maximum Ratings" are those values beyond which
the safety of the device cannot be guaranteed. The device should not be
operated at these limits. The parametric values defined in the Electrical
Characteristics tables are not guaranteed at the absolute maximum ratings.
The "Recommended Operating Conditions" table will define the conditions
for actual device operation.
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
DC Electrical Characteristics
Noise Characteristics
(Note 3)
Note 3: Input t
r
t
f
3 ns
Supply Voltage (V
CC
)
0.5V to
7.0V
DC Input Diode Current (I
IK
)
V
I
0.5V
20 mA
DC Input Voltage (V
I
)
0.5V to 7V
DC Output Diode Current (I
OK
)
V
O
0.5V
20 mA
V
O
V
CC
0.5V
20 mA
DC Output Voltage (V
O
)
0.5V to V
CC
0.5V
DC Output Source
or Sink Current (I
O
)
r
25 mA
DC V
CC
or Ground Current
(I
CC
or I
GND
)
r
75 mA
Storage Temperature (T
STG
)
65
q
C to
150
q
C
Power Dissipation
180 mW
Supply Voltage (V
CC
)
2.0V to 3.6V
Input Voltage (V
I
)
0V to 5.5V
Output Voltage (V
o
)
0V to V
CC
Operating Temperature (T
A
)
40
q
C to
85
q
C
Input Rise and Fall Time (
'
t/
'
V)
0 ns/V to 100 ns/V
Symbol
Parameter
V
CC
T
A
25
q
C
T
A
40
q
C to
85
q
C
Units
Conditions
Min
Typ
Max
Min
Max
V
IH
HIGH Level Input
2.0
1.5
1.5
Voltage
3.0
2.0
2.0
V
3.6
2.4
2.4
V
IL
LOW Level Input
2.0
0.5
0.5
Voltage
3.0
0.8
0.8
V
3.6
0.8
0.8
V
OH
HIGH Level Output
2.0
1.9
2.0
1.9
V
IN
V
IH
or V
IL
I
OH
50
P
A
Voltage
3.0
2.9
3.0
2.9
V
I
OH
50
P
A
3.0
2.58
2.48
I
OH
4 mA
V
OL
LOW Level Output
2.0
0.0
0.1
0.1
V
IN
V
IH
or V
IL
I
OL
50
P
A
Voltage
3.0
0.0
0.1
0.1
V
I
OL
50
P
A
3.0
0.36
0.44
I
OL
4 mA
I
OZ
3-STATE Output
3.6
r
0.25
r
2.5
P
A
V
IN
V
IH
or V
IL
Off-State Current
V
OUT
V
CC
or GND
I
IN
Input Leakage Current
3.6
r
0.1
r
1.0
P
A
V
IN
5.5V or GND
I
CC
Quiescent Supply Current
3.6
4.0
40.0
P
A
V
IN
V
CC
or GND
Symbol
Parameter
V
CC
T
A
25
q
C
Units
C
L
(pF)
(V)
Typ
Limit
V
OLP
Quiet Output Maximum Dynamic V
OL
3.3
0.5
0.8
V
50
V
OLV
Quiet Output Minimum Dynamic V
OL
3.3
0.5
0.8
V
50
V
IHD
Minimum HIGH Level Dynamic Input Voltage
3.3
2.0
V
50
V
ILD
Maximum LOW Level Dynamic Input Voltage
3.3
0.8
V
50
3
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74
L
V
X
2
44
AC Electrical Characteristics
Note 4: Parameter guaranteed by design. t
OSLH
|t
PLHm
t
PLHn
|, t
OSHL
|t
PHLm
t
PHLn
|
Capacitance
Note 5: C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
Symbol
Parameter
V
CC
T
A
25
q
C
T
A
40
q
C to
85
q
C
Units
Conditions
(V)
Min
Typ
Max
Min
Max
t
PLH
Propagation Delay
2.7
6.1
11.4
1.0
13.5
ns
C
L
15 pF
t
PHL
Time
8.6
14.9
1.0
17.0
C
L
50 pF
3.3
r
0.3
4.7
7.1
1.0
8.5
C
L
15 pF
7.2
10.6
1.0
12.0
C
L
50 pF
t
PZL
3-STATE Output
2.7
7.1
13.8
1.0
16.5
ns
C
L
15 pF,
t
PZH
Enable Time
R
L
1 k
:
9.6
17.3
1.0
20.0
C
L
50 pF,
R
L
1 k
:
3.3
r
0.3
5.5
8.8
1.0
10.5
C
L
15 pF,
R
L
1 k
:
8.0
12.3
1.0
14.0
C
L
50 pF,
R
L
1 k
:
t
PLZ
3-STATE Output
2.7
11.6
16.0
1.0
19.0
ns
C
L
50 pF,
t
PHZ
Disable Time
3.3
r
0.3
9.7
11.4
1.0
13.0
R
L
1 k
:
t
OSLH
Output to Output
2.7
1.5
1.5
ns
C
L
50 pF
t
OSHL
Skew (Note 4)
3.3
1.5
1.5
Symbol
Parameter
T
A
25
q
C
T
A
40
q
C to
85
q
C
Units
Min
Typ
Max
Min
Max
C
IN
Input Capacitance
4
10
10
pF
C
OUT
Output Capacitance
6
pF
C
PD
Power Dissipation Capacitance (Note 5)
19
pF
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4
74
L
VX244
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
5
www.fairchildsemi.com
74
L
V
X
2
44
Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
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