TL F 9501
54F74F240
54F74F241
54F74F244
Octal
BuffersLine
Drivers
with
TRI-STATE
Outputs
May 1995
54F 74F240
54F 74F241
54F 74F244
Octal Buffers Line Drivers with TRI-STATE
Outputs
General Description
The 'F240 'F241 and 'F244 are octal buffers and line driv-
ers designed to be employed as memory and address driv-
ers clock drivers and bus-oriented transmitters receivers
which provide improved PC and board density
Features
Y
TRI-STATE outputs drive bus lines or buffer memory
address registers
Y
Outputs sink 64 mA (48 mA mil)
Y
12 mA source current
Y
Input clamp diodes limit high-speed termination effects
Y
Guaranteed 4000V minimum ESD protection
Commercial
Military
Package
Package Description
Number
74F240PC
N20A
20-Lead (0 300 Wide) Molded Dual-In-Line
54F240DM (Note 2)
J20A
20-Lead Ceramic Dual-In-Line
74F240SC (Note 1)
M20B
20-Lead (0 300 Wide) Molded Small Outline JEDEC
74F240SJ (Note 1)
M20D
20-Lead (0 300 Wide) Molded Small Outline EIAJ
54F240FM (Note 2)
W20A
20-Lead Cerpack
54F240LM (Note 2)
E20A
20-Lead Ceramic Leadless Chip Carrier Type C
74F241PC
N20A
20-Lead (0 300 Wide) Molded Dual-In-Line
54F241DM (Note 2)
J20A
20-Lead Ceramic Dual-In-Line
74F241SC (Note 1)
M20B
20-Lead (0 300 Wide) Molded Small Outline JEDEC
74F241SJ (Note 1)
M20D
20-Lead (0 300 Wide) Molded Small Outline EIAJ
54F241FM (Note 2)
W20A
20-Lead Cerpack
54F241LM (Note 2)
E20A
20-Lead Ceramic Leadless Chip Carrier Type C
74F244PC
N20A
20-Lead (0 300 Wide) Molded Dual-In-Line
54F244DM (Note 2)
J20A
20-Lead Ceramic Dual-In-Line
74F244SC (Note 1)
M20B
20-Lead (0 300 Wide) Molded Small Outline JEDEC
74F244SJ (Note 1)
M20D
20-Lead (0 300 Wide) Molded Small Outline EIAJ
74F244MSA (Note 1)
MSA20
20-Lead Molded Shrink Small Outline EIAJ Type II
54F244FM (Note 2)
W20A
20-Lead Cerpack
54F244LM (Note 2)
E20A
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1
Devices also available in 13
reel Use Suffix
e
SCX SJX and MSAX
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
DMQB FMQB and LMQB
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M75 Printed in U S A
Connection Diagrams
Pin Assignment for LCC
'F240
TL F 9501 2
'F241
TL F 9501 4
'F244
TL F 9501 6
Pin Assignment for DIP SOIC SSOP and Flatpak
TL F 9501 1
TL F 9501 3
TL F 9501 5
Logic Symbols
IEEE IEC
'F240
TL F 9501 7
IEEE IEC
'F241
TL F 9501 8
IEEE IEC
'F244
TL F 9501 9
2
Unit Loading Fan Out
54F 74F
Pin Names
Description
U L
Input I
IH
I
IL
HIGH LOW
Output I
OH
I
OL
OE
1
OE
2
TRI-STATE Output Enable Input (Active LOW)
1 0 1 667
20 mA
b
1 mA
OE
2
TRI-STATE Output Enable Input (Active HIGH)
1 0 1 667
20 mA
b
1 mA
I
0
I
7
Inputs ('F240)
1 0 1 667
20 mA
b
1 mA
I
0
I
7
Inputs ('F241 'F244)
1 0 2 667
20 mA
b
1 6 mA
O
0
O
7
O
0
O
7
Outputs
600 106 6 (80)
b
12 mA 64 mA (48 mA)
Worst-case 'F240 enabled 'F241 'F244 disabled
Truth Tables
'F240
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
'F241
OE
1
D
1n
O
1n
OE
2
D
2n
O
2n
H
X
Z
L
X
Z
L
H
H
H
H
H
L
L
L
H
L
L
'F244
OE
1
D
1n
O
1n
OE
2
D
2n
O
2n
H
X
Z
H
X
Z
L
H
H
L
H
H
L
L
L
L
L
L
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
X
e
Immaterial
Z
e
High Impedance
3
Absolute Maximum Ratings
(Note 1)
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Storage Temperature
b
65 C to
a
150 C
Ambient Temperature under Bias
b
55 C to
a
125 C
Junction Temperature under Bias
b
55 C to
a
175 C
Plastic
b
55 C to
a
150 C
V
CC
Pin Potential to
Ground Pin
b
0 5V to
a
7 0V
Input Voltage (Note 2)
b
0 5V to
a
7 0V
Input Current (Note 2)
b
30 mA to
a
5 0 mA
Voltage Applied to Output
in HIGH State (with V
CC
e
0V)
Standard Output
b
0 5V to V
CC
TRI-STATE Output
b
0 5V to
a
5 5V
Current Applied to Output
in LOW State (Max)
twice the rated I
OL
(mA)
ESD Last Passing Voltage (Min)
4000V
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
Recommended Operating
Conditions
Free Air Ambient Temperature
Military
b
55 C to
a
125 C
Commercial
0 C to
a
70 C
Supply Voltage
Military
a
4 5V to
a
5 5V
Commercial
a
4 5V to
a
5 5V
DC Electrical Characteristics
Symbol
Parameter
54F 74F
Units
V
CC
Conditions
Min
Typ
Max
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
b
1 2
V
Min
I
IN
e b
18 mA
V
OH
Output HIGH
54F 10% V
CC
2 4
I
OH
e b
3 mA
Voltage
54F 10% V
CC
2 0
I
OH
e b
12 mA
74F 10% V
CC
2 4
V
Min
I
OH
e b
3 mA
74F 10% V
CC
2 0
I
OH
e b
15 mA
74F 5% V
CC
2 7
I
OH
e b
3 mA
V
OL
Output LOW
54F 10% V
CC
0 55
V
Min
I
OL
e
48 mA
Voltage
74F 10% V
CC
0 55
I
OL
e
64 mA
I
IH
Input HIGH
54F
20 0
m
A
Max
V
IN
e
2 7V
Current
74F
5 0
I
BVI
Input HIGH Current
54F
100
m
A
Max
V
IN
e
7 0V
Breakdown Test
74F
7 0
I
CEX
Output HIGH
54F
250
m
A
Max
V
OUT
e
V
CC
Leakage Current
74F
50
V
ID
Input Leakage
74F
4 75
V
0 0
I
ID
e
1 9 mA
Test
All Other Pins Grounded
I
OD
Output Leakage
74F
3 75
m
A
0 0
V
IOD
e
150 mV
Circuit Current
All Other Pins Grounded
I
IL
Input LOW Current
b
1 0
mA
Max
V
IN
e
0 5V (OE
1
OE
2
OE
2
D
n
('F240))
b
1 6
V
IN
e
0 5V (D
n
('F241 'F244))
I
OZH
Output Leakage Current
50
m
A
Max
V
OUT
e
2 7V
I
OZL
Output Leakage Current
b
50
m
A
Max
V
OUT
e
0 5V
I
OS
Output Short-Circuit Current
b
100
b
225
mA
Max
V
OUT
e
0V
I
ZZ
Bus Drainage Test
500
m
A
0 0V
V
OUT
e
5 25V
4
DC Electrical Characteristics
(Continued)
Symbol
Parameter
54F 74F
Units
V
CC
Conditions
Min
Typ
Max
I
CCH
Power Supply Current ('F240)
19
29
mA
Max
V
O
e
HIGH
I
CCL
Power Supply Current ('F240)
50
75
mA
Max
V
O
e
LOW
I
CCZ
Power Supply Current ('F240)
42
63
mA
Max
V
O
e
HIGH Z
I
CCH
Power Supply Current
40
60
mA
Max
V
O
e
HIGH
('F241 'F244)
I
CCL
Power Supply Current
60
90
mA
Max
V
O
e
LOW
('F241 'F244)
I
CCZ
Power Supply Current
60
90
mA
Max
V
O
e
HIGH Z
('F241 'F244)
AC Electrical Characteristics
74F
54F
74F
T
A
e a
25 C
T
A
V
CC
e
Mil
T
A
V
CC
e
Com
Symbol
Parameter
V
CC
e a
5 0V
C
L
e
50 pF
C
L
e
50 pF
Units
C
L
e
50 pF
Min
Typ
Max
Min
Max
Min
Max
t
PLH
Propagation Delay
3 0
5 1
7 0
3 0
9 0
3 0
8 0
ns
t
PHL
Data to Output ('F240)
2 0
3 5
4 7
2 0
6 0
2 0
5 7
t
PZH
Output Enable Time ('F240)
2 0
3 5
4 7
2 0
6 5
2 0
5 7
t
PZL
4 0
6 9
9 0
4 0
10 5
4 0
10 0
ns
t
PHZ
Output Disable Time ('F240)
2 0
4 0
5 3
2 0
6 5
2 0
6 3
t
PLZ
2 0
6 0
8 0
2 0
12 5
2 0
9 5
t
PLH
Propagation Delay
2 5
4 0
5 2
2 0
6 5
2 5
6 2
ns
t
PHL
Data to Output ('F241 'F244)
2 5
4 0
5 2
2 0
7 0
2 5
6 5
t
PZH
Output Enable Time
2 0
4 3
5 7
2 0
7 0
2 0
6 7
t
PZL
('F241 'F244)
2 0
5 4
7 0
2 0
8 5
2 0
8 0
ns
t
PHZ
Output Disable Time
2 0
4 5
6 0
2 0
7 0
2 0
7 0
t
PLZ
('F241 'F244)
2 0
4 5
6 0
2 0
7 5
2 0
7 0
Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are
defined as follows
74F
240 241 244
S
C
X
Temperature Range Family
Special Variations
74F
e
Commercia
QB
e
Military grade device with
54F
e
Military
environmental and burn-in
processing
Device Type
X
e
devices shipped in 13 reel
Package Code
Temperature Range
P
e
Plastic DIP
C
e
Commercial (0 C to
a
70 C)
D
e
Ceramic DIP
M
e
Military (
b
55 C to
a
125 C)
F
e
Flatpak
NOTE
L
e
Leadless Chip Carrier (LCC)
Not required for MSA package
S
e
Small Outline SOIC JEDEC
code
MSA
e
Shrink Small Outline Package (EIAJ SSOP)
('244 only)
SJ
e
Small Outline SOIC EIAJ
5
6
Physical Dimensions
inches (millimeters)
20-Lead Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
20-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J20A
7
Physical Dimensions
inches (millimeters) (Continued)
20-Lead (0 300 Wide) Molded Small Outline Package JEDEC (S)
NS Package Number M20B
20-Lead (0 300 Wide) Molded Small Outline Package EIAJ (SJ)
NS Package Number M20D
8
Physical Dimensions
inches (millimeters) (Continued)
20-Lead Molded Shrink Small Outline EIAJ Type II (MSA)
NS Package Number MSA20
20-Lead (0 300 Wide) Molded Dual-In-Line Package (P)
NS Package Number N20A
9
54F74F240
54F74F241
54F74F244
Octal
BuffersLine
Drivers
with
TRI-STATE
Outputs
Physical Dimensions
inches (millimeters) (Continued)
20-Lead Ceramic Flatpak (F)
NS Package Number W20A
LIFE SUPPORT POLICY
NATIONAL'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 NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
2 A critical component is any component of a life
systems which (a) are intended for surgical implant
support device or system whose failure to perform can
into the body or (b) support or sustain life and whose
be reasonably expected to cause the failure of the life
failure to perform when properly used in accordance
support device or system or to affect its safety or
with instructions for use provided in the labeling can
effectiveness
be reasonably expected to result in a significant injury
to the user
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