74F2244 Octal Buffer/Line Driver with 25Ω Series Resistors in Outputs
October 1988
Revised March 1999
74F2244
Octal Buffer/Line Driver
with 25Ω Series Resistors in Outputs
General Description
The F2244 is an octal buffer/line driver designed to drive
the capacitive inputs of MOS memory drivers, address driv-
ers, clock drivers and bus-oriented transmitters/receivers.
The 25Ω series resistors in the outputs reduce ringing and
eliminate the need for external resistors.
Features
s
3-STATE outputs drive bus lines or buffer memory
address registers
s
12 mA source current
s
25Ω series resistors in outputs eliminate the need for
external resistors.
s
Designed to drive the capacitive inputs of MOS devices
s
Guaranteed 4000V minimum ESD protection
Ordering Code:
Order Number
74F2244SC
74F2244MSA
74F2244PC
Package Number
M20B
MSA20
N20A
Package Description
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Logic Symbol
IEEE/IEC
© 1999 Fairchild Semiconductor Corporation
DS009499.prf
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74F2244
Unit Loading/Fan Out
U.L.
Pin Names
OE
1
, OE
2
OE
2
I
an
, I
bn
O
an
,O
bn
Description
HIGH/LOW
3-STATE Output Enable Input (Active LOW)
3-STATE Output Enable Input (Active HIGH)
Inputs
Outputs
1.0/1.667
1.0/1.667
1.0/2.667 (Note 1)
750/20
Input I
IH
/I
IL
Output I
OH
/I
OL
20
µA/−1
mA
20
µA/−1
mA
20
µA/−1.6
mA
−15
mA/12 mA
Note 1:
Worst-case F2244 disabled
Truth Table
OE
1
H
L
L
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
I
an
X
H
L
O
an
Z
H
L
OE
2
H
L
L
I
bn
X
H
L
O
bn
Z
H
L
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2
74F2244
Absolute Maximum Ratings
(Note 2)
Storage Temperature
Ambient Temperature under Bias
Junction Temperature under Bias
V
CC
Pin Potential to Ground Pin
Input Voltage (Note 3)
Input Current (Note 3)
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
3-STATE Output
Current Applied to Output
in LOW State (Max)
ESD Last Passing Voltage (Min)
twice the rated I
OL
(mA)
4000V
−0.5V
to V
CC
−0.5V
to
+5.5V
−65°C
to
+150°C
−55°C
to
+125°C
−55°C
to
+150°C
−0.5V
to
+7.0V
−0.5V
to
+7.0V
−30
mA to
+5.0
mA
Recommended Operating
Conditions
Free Air Ambient Temperature
Supply Voltage
0°C to
+70°C
+4.5V
to
+5.5V
Note 2:
Absolute maximum ratings are values beyond which the device
may be damaged or have its useful life impaired. Functional operation
under these conditions is not implied.
Note 3:
Either voltage limit or current limit is sufficient to protect inputs.
DC Electrical Characteristics
Symbol
V
IH
V
IL
V
CD
V
OH
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
10% V
CC
10% V
CC
5% V
CC
V
OL
I
IH
I
BVI
I
CEX
V
ID
I
OD
I
IL
I
OZH
I
OZL
I
OS
I
CCH
I
CCL
I
CCZ
Output LOW Voltage
Input HIGH Current
Input HIGH Current Breakdown Test
Output HIGH Leakage Current
Input Leakage
Test
Output Leakage
Circuit Current
Input LOW Current
Output Leakage Current
Output Leakage Current
Output Short-Circuit Current
Power Supply Current
Power Supply Current
Power Supply Current
−100
40
60
60
−1.0
−1.6
50
−50
−225
60
90
90
µA
µA
mA
mA
mA
mA
Max
Max
Max
Max
Max
Max
mA
Max
3.75
µA
0.0
4.75
2.4
2.0
2.7
0.50
0.75
5.0
7.0
50
µA
µA
µA
V
Max
Max
Max
0.0
V
Min
Min
2.0
0.8
−1.2
Typ
Max
Units
V
V
V
V
Min
Min
V
CC
Conditions
Recognized as a HIGH Signal
Recognized as a LOW Signal
I
IN
= −18
mA
I
OH
= −3
mA
I
OH
= −15
mA
I
OH
= −3
mA
I
OL
=
1 mA
I
OL
=
12 mA
V
IN
=
2.7V
V
IN
=
7.0V
V
OUT
=
V
CC
I
ID
=
1.9
µA
All other pins grounded
V
IOD
=
150 mV
All other pins grounded
V
IN
=
0.5V (OE
1
, OE
2
, OE
2
)
V
IN
=
0.5V (I
n
)
V
OUT
=
2.7V
V
OUT
=
0.5V
V
OUT
=
0V
V
O
=
HIGH
V
O
=
LOW
V
O
=
HIGH Z
3
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74F2244
AC Electrical Characteristics
T
A
= +25°C
Symbol
Parameter
Min
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Output Disable Time
Propagation Delay
Data to Output
Output Enable Time
1.5
2.5
1.5
2.5
1.5
1.5
V
CC
= +5.0V
C
L
=
50 pF
Typ
Max
7.0
8.0
9.0
11.5
9.0
8.5
Min
2.0
2.0
2.0
2.0
2.0
2.0
Max
6.5
7.0
7.0
8.5
7.0
7.5
Min
1.5
2.0
1.0
2.5
1.0
1.5
Max
7.0
8.0
9.5
12.0
9.5
9.5
ns
ns
T
A
= −55°C
to
+125°C
C
L
=
50 pF
T
A
=
0°C to
+70°C
C
L
=
50 pF
Units
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4
74F2244
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 Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
Package Number MSA20
5
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