October 1988
Revised March 1999
7
4F2244
O
c
t
a
l
Buf
f
er
/Li
ne Dr
ive
r
wi
th
25
Ser
i
es
Resi
stor
s i
n
Out
puts
1999 Fairchild Semiconductor Corporation
DS009499.prf
www.fairchildsemi.com
74F2244
Octal Buffer/Line Driver
with 25
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 25
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
25
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:
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Connection Diagram
Logic Symbol
IEEE/IEC
Order Number
Package Number
Package Description
74F2244SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F2244MSA
MSA20
20-Lead Shrink Small Outline Package (SSOP), EIAJ TYPE II, 5.3mm Wide
74F2244PC
N20A
20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
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2
74F2244
Unit Loading/Fan Out
Note 1: Worst-case F2244 disabled
Truth Table
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
Z
=
High Impedance
Pin Names
Description
U.L.
Input I
IH
/I
IL
HIGH/LOW
Output I
OH
/I
OL
OE
1
, OE
2
3-STATE Output Enable Input (Active LOW)
1.0/1.667
20
A/
-
1 mA
OE
2
3-STATE Output Enable Input (Active HIGH)
1.0/1.667
20
A/
-
1 mA
I
an
, I
bn
Inputs
1.0/2.667 (Note 1)
20
A/
-
1.6 mA
O
an
,O
bn
Outputs
750/20
-
15 mA/12 mA
OE
1
I
an
O
an
OE
2
I
bn
O
bn
H
X
Z
H
X
Z
L
H
H
L
H
H
L
L
L
L
L
L
3
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7
4F2244
Absolute Maximum Ratings
(Note 2)
Recommended Operating
Conditions
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
Storage Temperature
-
65
C to
+
150
C
Ambient Temperature under Bias
-
55
C to
+
125
C
Junction Temperature under Bias
-
55
C to
+
150
C
V
CC
Pin Potential to Ground Pin
-
0.5V to
+
7.0V
Input Voltage (Note 3)
-
0.5V to
+
7.0V
Input Current (Note 3)
-
30 mA to
+
5.0 mA
Voltage Applied to Output
in HIGH State (with V
CC
=
0V)
Standard Output
-
0.5V to V
CC
3-STATE Output
-
0.5V to
+
5.5V
Current Applied to Output
in LOW State (Max)
twice the rated I
OL
(mA)
ESD Last Passing Voltage (Min)
4000V
Free Air Ambient Temperature
0
C to
+
70
C
Supply Voltage
+
4.5V to
+
5.5V
Symbol
Parameter
Min
Typ
Max
Units
V
CC
Conditions
V
IH
Input HIGH Voltage
2.0
V
Recognized as a HIGH Signal
V
IL
Input LOW Voltage
0.8
V
Recognized as a LOW Signal
V
CD
Input Clamp Diode Voltage
-
1.2
V
Min
I
IN
=
-
18 mA
V
OH
Output HIGH Voltage
10% V
CC
2.4
V
Min
I
OH
=
-
3 mA
10% V
CC
2.0
I
OH
=
-
15 mA
5% V
CC
2.7
I
OH
=
-
3 mA
V
OL
Output LOW Voltage
0.50
V
Min
I
OL
=
1 mA
0.75
I
OL
=
12 mA
I
IH
Input HIGH Current
5.0
A
Max
V
IN
=
2.7V
I
BVI
Input HIGH Current Breakdown Test
7.0
A
Max
V
IN
=
7.0V
I
CEX
Output HIGH Leakage Current
50
A
Max
V
OUT
=
V
CC
V
ID
Input Leakage
4.75
V
0.0
I
ID
=
1.9
A
Test
All other pins grounded
I
OD
Output Leakage
3.75
A
0.0
V
IOD
=
150 mV
Circuit Current
All other pins grounded
I
IL
Input LOW Current
-
1.0
mA
Max
V
IN
=
0.5V (OE
1
, OE
2
, OE
2
)
-
1.6
V
IN
=
0.5V (I
n
)
I
OZH
Output Leakage Current
50
A
Max
V
OUT
=
2.7V
I
OZL
Output Leakage Current
-
50
A
Max
V
OUT
=
0.5V
I
OS
Output Short-Circuit Current
-
100
-
225
mA
Max
V
OUT
=
0V
I
CCH
Power Supply Current
40
60
mA
Max
V
O
=
HIGH
I
CCL
Power Supply Current
60
90
mA
Max
V
O
=
LOW
I
CCZ
Power Supply Current
60
90
mA
Max
V
O
=
HIGH Z
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4
74F2244
AC Electrical Characteristics
Symbol
Parameter
T
A
=
+
25
C
T
A
=
-
55
C to
+
125
C
T
A
=
0
C to
+
70
C
Units
V
CC
=
+
5.0V
C
L
=
50 pF
C
L
=
50 pF
C
L
=
50 pF
Min
Typ
Max
Min
Max
Min
Max
t
PLH
Propagation Delay
1.5
7.0
2.0
6.5
1.5
7.0
ns
t
PHL
Data to Output
2.5
8.0
2.0
7.0
2.0
8.0
t
PZH
Output Enable Time
1.5
9.0
2.0
7.0
1.0
9.5
t
PZL
2.5
11.5
2.0
8.5
2.5
12.0
ns
t
PHZ
Output Disable Time
1.5
9.0
2.0
7.0
1.0
9.5
t
PLZ
1.5
8.5
2.0
7.5
1.5
9.5
5
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7
4F2244
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
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