Revised April 2005
74LVX244
Low Voltage Octal Buffer/Line Driver with
3-STATE Outputs
General Description
Features
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.
■ Input voltage translation from 5V to 3V
■ Ideal for low power/low noise 3.3V applications
■ Guaranteed simultaneous switching noise level and
dynamic threshold performance
Ordering Code:
Order Number
Package Number
74LVX244M
74LVX244SJ
74LVX244MTC
Package Description
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
M20D
Pb-Free 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
MTC20
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
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.
Pin Descriptions
Logic Symbol
IEEE/IEC
Pin Names
Description
OE1, OE2
3-STATE Output Enable Inputs
I0–I7
Inputs
O0–O7
Outputs
Truth Tables
Inputs
Connection Diagram
Outputs
In
OE1
L
L
L
L
H
H
H
X
Z
Inputs
H
X
© 2005 Fairchild Semiconductor Corporation
DS011552
(Pins 12, 14, 16, 18)
Outputs
OE2
In
L
L
L
L
H
H
H
X
HIGH Voltage Level
Immaterial
(Pins 3, 5, 7, 9)
Z
L LOW Voltage Level
Z High Impedance
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74LVX244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs
February 1993
74LVX244
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions (Note 2)
0.5V to 7.0V
Supply Voltage (VCC)
DC Input Diode Current (IIK)
VI
Supply Voltage (VCC)
0.5V
20 mA
0.5V to 7V
DC Input Voltage (VI)
VO
0V to 5.5V
Output Voltage (Vo)
DC Output Diode Current (IOK)
VO
2.0V to 3.6V
Input Voltage (VI)
0V to VCC
40qC to 85qC
Operating Temperature (TA)
0.5V
VCC 0.5V
20 mA
20 mA
0.5V to VCC 0.5V
DC Output Voltage (VO)
Input Rise and Fall Time ('t/'V)
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.
DC Output Source
r25 mA
or Sink Current (IO)
DC VCC or Ground Current
r75 mA
65qC to 150qC
(ICC or IGND)
Storage Temperature (TSTG)
Power Dissipation
0 ns/V to 100 ns/V
Note 2: Unused inputs must be held HIGH or LOW. They may not float.
180 mW
DC Electrical Characteristics
Symbol
VIH
VIL
VOH
VOL
IOZ
Parameter
TA
VCC
Min
25qC
TA
Typ
Max
40qC to 85qC
Min
HIGH Level Input
2.0
1.5
1.5
Voltage
3.0
2.0
2.0
3.6
2.4
2.4
2.0
0.5
0.5
Voltage
3.0
0.8
0.8
3.6
0.8
0.8
2.0
1.9
2.0
1.9
Voltage
3.0
2.9
3.0
2.9
3.0
2.58
V
VIN
VIH or VIL IOH
50 PA
IOH
50 PA
V
2.48
LOW Level Output
2.0
0.0
Voltage
3.0
0.0
3-STATE Output
Conditions
V
LOW Level Input
HIGH Level Output
Units
Max
IOH
0.1
0.1
VIN
0.1
0.1
3.0
0.36
0.44
3.6
r0.25
r2.5
PA
VIN
50 PA
IOL
50 PA
IOL
4 mA
V
Off-State Current
VOUT
VIH or VIL
VCC or GND
IIN
Input Leakage Current
3.6
r0.1
r1.0
PA
VIN
5.5V or GND
ICC
Quiescent Supply Current
3.6
4.0
40.0
PA
VIN
VCC or GND
Noise Characteristics
Symbol
(Note 3)
VCC
Parameter
(V)
TA
Typ
25qC
Units
CL (pF)
50
Limit
VOLP
Quiet Output Maximum Dynamic VOL
3.3
0.5
0.8
V
VOLV
Quiet Output Minimum Dynamic VOL
3.3
0.5
0.8
V
50
VIHD
Minimum HIGH Level Dynamic Input Voltage
3.3
2.0
V
50
VILD
Maximum LOW Level Dynamic Input Voltage
3.3
0.8
V
50
Note 3: Input tr
tf
3 ns
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2
4 mA
VIH or VIL IOL
74LVX244
AC Electrical Characteristics
Symbol
VCC
Parameter
tPLH
Propagation Delay
tPHL
Time
(V)
TA
Min
2.7
3.3 r 0.3
tPZL
3-STATE Output
tPZH
Enable Time
2.7
25qC
Max
Min
Max
6.1
11.4
1.0
13.5
8.6
14.9
1.0
17.0
4.7
7.1
1.0
8.5
7.2
10.6
1.0
7.1
13.8
1.0
9.6
3.3 r 0.3
40qC to 85qC
TA
Typ
17.3
5.5
8.8
8.0
12.3
1.0
50 pF
15 pF
12.0
CL
50 pF
16.5
CL
15 pF,
RL
1 k:
CL
50 pF,
RL
1 k:
CL
15 pF,
RL
1 k:
CL
50 pF,
RL
1 k:
CL
50 pF,
RL
1 k:
CL
50 pF
ns
20.0
1.0
10.5
1.0
15 pF
CL
ns
14.0
3-STATE Output
2.7
11.6
16.0
1.0
19.0
tPHZ
Disable Time
3.3 r 0.3
9.7
11.4
1.0
13.0
tOSLH
Output to Output
2.7
1.5
1.5
tOSHL
Skew (Note 4)
3.3
1.5
1.5
|tPLHm tPLHn|, tOSHL
Conditions
CL
CL
tPLZ
Note 4: Parameter guaranteed by design. tOSLH
Units
ns
ns
|t PHLm t PHLn|
Capacitance
Symbol
TA
Parameter
Min
25qC
TA 40qC to 85qC
Typ
Max
10
Min
Max
10
Units
CIN
Input Capacitance
4
COUT
Output Capacitance
6
pF
pF
CPD
Power Dissipation Capacitance (Note 5)
19
pF
Note 5: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load.
3
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74LVX244
Physical Dimensions inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" Wide
Package Number M20B
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4
74LVX244
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
5
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74LVX244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Package Number MTC20
Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and
Fairchild reserves the right at any time without notice to change said circuitry and specifications.
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FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD
SEMICONDUCTOR CORPORATION. As used herein:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
1. Life support devices or systems are devices or systems
which, (a) are intended for surgical implant into the
body, or (b) support or sustain life, and (c) whose failure
to perform when properly used in accordance with
instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the
user.
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