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
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