74LVT2244 • 74LVTH2244 Low Voltage Octal Buffer/Line Driver with 3-STATE Outputs
July 1999
Revised August 1999
74LVT2244 • 74LVTH2244
Low Voltage Octal Buffer/Line Driver
with 3-STATE Outputs
General Description
The LVT2244 and LVTH2244 are octal buffers and line
drivers designed to be employed as memory address driv-
ers, clock drivers and bus oriented transmitters or receivers
which provides improved PC board density. The equivalent
25Ω-Series resistors helps reduce output overshoot and
undershoot.
The LVTH2244 data inputs include bushold, eliminating the
need for external pull-up resistors to hold unused inputs.
These octal buffers and line drivers are designed for low-
voltage (3.3V) V
CC
applications, but with the capability to
provide a TTL interface to a 5V environment. The LVT2244
and LVTH2244 are fabricated with an advanced BiCMOS
technology to achieve high speed operation similar to 5V
ABT while maintaining low power dissipation.
Features
s
Input and output interface capability to systems at
5V V
CC
s
Equivalent 25Ω-Series resistors on outputs
s
Bushold data inputs eliminate the need for external pull-
up resistors to hold unused inputs (74LVTH2244), also
available without bushold feature (74LVT2244).
s
Live insertion/extraction permitted
s
Power Up/Down high impedance provides glitch-free
bus loading
s
Outputs source/sink
−12
mA/+12 mA
s
Latch-up performance exceeds 500 mA
Ordering Code:
Order Number
74LVT2244WM
74LVT2244SJ
74LVT2244MTC
74LVTH2244WM
74LVTH2244SJ
74LVTH2244MTC
Package Number
M20B
M20D
MTC20
M20B
M20D
MTC20
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
© 1999 Fairchild Semiconductor Corporation
DS012170
www.fairchildsemi.com
74LVT2244 • 74LVTH2244
Pin Descriptions
Pin Names
OE
1
, OE
2
I
0
–I
7
O
0
–O
7
Description
3-STATE Output Enable Inputs
Inputs
Outputs
Truth Tables
Inputs
OE
1
L
L
H
Inputs
OE
2
L
L
H
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
I
n
L
H
X
Outputs
(Pins 12, 14, 16, 18)
L
H
Z
Outputs
(Pins 3, 5, 7, 9)
I
n
L
H
X
L
H
Z
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2
74LVT2244 • 74LVTH2244
Absolute Maximum Ratings
(Note 1)
Symbol
V
CC
V
I
V
O
I
IK
I
OK
I
O
I
CC
I
GND
T
STG
Parameter
Supply Voltage
DC Input Voltage
DC Output Voltage
DC Input Diode Current
DC Output Diode Current
DC Output Current
DC Supply Current per Supply Pin
DC Ground Current per Ground Pin
Storage Temperature
Value
−0.5
to
+4.6
−0.5
to
+7.0
−0.5
to
+7.0
−0.5
to
+7.0
−50
−50
64
128
±64
±128
−65
to
+150
Output in 3-STATE
Output in HIGH or LOW State (Note 2)
V
I
<
GND
V
O
<
GND
V
O
>
V
CC
Output at HIGH State
V
O
>
V
CC
Output at LOW State
Conditions
Units
V
V
V
V
mA
mA
mA
mA
mA
°C
Recommended Operating Conditions
Symbol
V
CC
V
I
I
OH
I
OL
T
A
∆t/∆V
Supply Voltage
Input Voltage
HIGH-Level Output Current
LOW-Level Output Current
Free-Air Operating Temperature
Input Edge Rate, V
IN
=
0.8V–2.0V, V
CC
=
3.0V
−40
0
Parameter
Min
2.7
0
Max
3.6
5.5
−12
12
85
10
Units
V
V
mA
°C
ns/V
Note 1:
Absolute Maximum continuous ratings are those values beyond which damage to the device may occur. Exposure to these conditions or conditions
beyond those indicated may adversely affect device reliability. Functional operation under absolute maximum rated conditions is not implied.
Note 2:
I
O
Absolute Maximum Rating must be observed.
DC Electrical Characteristics
Symbol
Parameter
V
CC
(V)
2.7
2.7–3.6
2.7–3.6
2.7–3.6
3.0
V
OL
I
I(HOLD)
(Note 4)
I
I(OD)
(Note 4)
I
I
Output LOW Voltage
Bushold Input Minimum Drive
Bushold Input Over-Drive
Current to Change State
Input Current
Control Pins
Data Pins
I
OFF
I
PU/PD
I
OZL
I
OZH
I
OZH
+
I
CCH
I
CCL
I
CCZ
Power Off Leakage Current
Power up/down 3-STATE
Output Current
3-STATE Output Leakage Current
3-STATE Output Leakage Current
3-STATE Output Leakage Current
Power Supply Current
Power Supply Current
Power Supply Current
2.7
3.0
3.0
3.0
3.6
3.6
3.6
0
0–1.5V
3.6
3.6
3.6
3.6
3.6
3.6
75
−75
500
−500
10
±1
−5
1
±100
±100
−5
5
10
0.19
5
0.19
V
CC
−
0.2
2.0
0.2
0.8
2.0
0.8
T
A
=−40°C
to
+85°C
Min
Typ
(Note 3)
Units
Max
−1.2
V
V
V
V
V
V
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
mA
mA
mA
I
I
= −18
mA
V
O
≤
0.1V or
V
O
≥
V
CC
−
0.1V
I
OH
= −100 µA
I
OH
= −12
mA
I
OL
=
100
µA
I
OL
=
12 mA
V
I
=
0.8V
V
I
=
2.0V
(Note 5)
(Note 6)
V
I
=
5.5V
V
I
=
0V or V
CC
V
I
=
0V
V
I
=
V
CC
0V
≤
V
I
or V
O
≤
5.5V
V
O
=
0.5V to 3.0V
V
I
=
GND or V
CC
V
O
=
0.5V
V
O
=
3.0V
V
CC
<
V
O
≤
5.5V
Outputs HIGH
Outputs LOW
Outputs Disabled
Conditions
V
IK
V
IH
V
IL
V
OH
Input Clamp Diode Voltage
Input HIGH Voltage
Input LOW Voltage
Output HIGH Voltage
3
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74LVT2244 • 74LVTH2244
DC Electrical Characteristics
Symbol
I
CCZ
+
∆I
CC
Parameter
Power Supply Current
Increase in Power Supply Current
(Note 7)
Note 3:
All typical values are at V
CC
=
3.3V, T
A
=
25°C.
Note 4:
Applies to bushold versions only (74LVTH2244).
(Continued)
T
A
=−40°C
to
+85°C
Min
Typ
(Note 3)
Max
0.19
0.2
Units
mA
mA
Conditions
V
CC
≤
V
O
≤
5.5V,
Outputs Disabled
3.6
One Input at V
CC
−
0.6V
Other Inputs at V
CC
or GND
V
CC
(V)
3.6
Note 5:
An external driver must source at least the specified current to switch from LOW-to-HIGH.
Note 6:
An external driver must sink at least the specified current to switch from HIGH-to-LOW.
Note 7:
This is the increase in supply current for each, input that is at the specified voltage level rather than V
CC
or GND.
Dynamic Switching Characteristics
Symbol
V
OLP
V
OLV
Parameter
Quiet Output Maximum Dynamic V
OL
Quiet Output Minimum Dynamic V
OL
V
CC
(V)
3.3
3.3
(Note 8)
T
A
=
25°C
Min
Typ
0.8
−0.8
Max
Units
V
V
Conditions
C
L
=
50 pF,
R
L
=
500Ω
(Note 9)
Note 8:
Characterized in SOIC package. Guaranteed parameter, but not tested.
Note 9:
Max number of outputs defined as (n). n−1 data inputs are driven 0V to 3V. Output under test held LOW.
AC Electrical Characteristics
T
A
= −40°C
to
+85°C
C
L
=
50 pF, R
L
=
500Ω
Symbol
Parameter
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
t
OSHL
t
OSLH
Output to Output Skew
(Note 11)
Output Disable Time
Output Enable Time
Propagation Delay Data to Output
1.0
1.0
1.0
1.1
1.9
1.8
V
CC
=
3.3V
±
0.3V
Typ
(Note 10)
4.4
4.1
5.9
5.5
6.1
4.5
1.0
1.0
1.0
1.0
1.1
1.9
1.8
5.3
4.4
7.7
6.2
6.8
4.5
1.0
ns
ns
ns
ns
Max
V
CC
=
2.7V
Min
Max
Units
Note 10:
All typical values are at V
CC
=
3.3V, T
A
=
25°C.
Note 11:
Skew is defined as the absolute value of the difference between the actual propagation delay for any two separate outputs of the same device. The
specification applies to any outputs switching in the same direction, either HIGH-to-LOW (t
OSHL
) or LOW-to-HIGH (t
OSLH
).
Capacitance
Symbol
C
IN
C
OUT
(Note 12)
Parameter
Conditions
V
CC
=
0V, V
I
=
0V or V
CC
V
CC
=
3.0V, V
O
=
0V or V
CC
Typical
3
6
Units
pF
pF
Input Capacitance
Output Capacitance
Note 12:
Capacitance is measured at frequency f
=
1 MHz, per MIL-STD-883B, Method 3012.
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4
74LVT2244 • 74LVTH2244
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
Package Number M20D
5
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