January 1995
Revised May 1999
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1999 Fairchild Semiconductor Corporation
DS010898.prf
www.fairchildsemi.com
74F2240
Octal Buffer/Line Driver
with 25
Series Resistors in the Outputs
General Description
The 74F2240 is an inverting octal buffer and line driver
designed to drive capacitive inputs of MOS memory
devices, address and clock lines or act as a low under-
shoot general purpose bus driver.
The 25
series resistor in the outputs reduces undershoot
and ringing and eliminates the need for external resistors.
Features
s
3-STATE outputs drive bus lines or buffer memory
address registers
s
Outputs sink 12 mA and source 15 mA
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
Truth Table
Unit Loading/Fan Out
Order Number
Package Number
Package Description
74F2240SC
M20B
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F2240QC
V20A
20-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.350 Square
OE
1
D
1n
O
1n
OE
2
D
2n
O
2n
H
X
Z
H
X
Z
L
H
L
L
H
L
L
L
H
L
L
H
Pin
Description
U.L. Output
Names
HIGH/LOW
I
OH
/I
OL
OE
1
, OE
2
3-STATE Output
1.0/1.667
20
A/
-
1 mA
Enable Input
(Active LOW)
I
0
- I
7
Inputs
1.0/1.667
20
A/
-
1 mA
O
0
- O
7
Outputs
750/20
-
15 mA/12 mA
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2
74F2240
Absolute Maximum Ratings
(Note 1)
Recommended Operating
Conditions
Note 1: 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 2: 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
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 2)
-
0.5V to
+
7.0V
Input Current (Note 2)
-
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
10% V
CC
2.4
V
Min
I
OH
=
-
3 mA
Voltage
10% V
CC
2.0
I
OH
=
-
15 mA
V
OL
Output LOW Voltage
10% V
CC
0.75
V
Min
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
-
1.0
mA
Max
V
IN
=
0.5V
Current
(OE
1
, OE
2
, D
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
ZZ
Bus Drainage Test
500
A
0.0
V
OUT
=
5.25V
I
CCH
Power Supply Current
16
29
mA
Max
V
O
=
HIGH
I
CCL
Power Supply Current
47
75
mA
Max
V
O
=
LOW
I
CCZ
Power Supply Current
45
63
mA
Max
V
O
=
HIGH Z
3
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7
4F2240
AC Electrical Characteristics
Symbol
Parameter
T
A
=
+
25
C
T
A
=
0
C to
+
70
C
Units
V
CC
=
+
5.0V
V
CC
=
+
5.0V
C
L
=
50 pF
C
L
=
50 pF
Min
Typ
Max
Min
Max
t
PLH
Propagation Delay
3.0
4.9
7.5
3.0
7.5
ns
t
PHL
Data to Output
2.0
3.7
6.0
2.0
6.0
t
PZH
Output Enable Time
2.0
3.9
6.5
2.0
7.0
ns
t
PZL
4.0
6.7
9.5
4.0
10.0
t
PHZ
Output Disable Time
2.0
4.1
6.5
2.0
7.0
ns
t
PLZ
2.0
4.9
8.5
2.0
9.5
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4
74F2240
Physical Dimensions
inches (millimeters) unless otherwise noted
20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
Package Number M20B
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.
7
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LIFE SUPPORT POLICY
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:
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 rea-
sonably expected to result in a significant injury to the
user.
2. A critical component in any component of a life support
device or system whose failure to perform can be rea-
sonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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Physical Dimensions
inches (millimeters) unless otherwise noted (Continued)
20-Lead Plastic Lead Chip Carrier (PLCC), JEDEC MO-047, 0.350 Square
Package Number V20A
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