TL F 9502
54F74F243
Quad
Bus
Transceiver
with
TRI-STATE
Outputs
November 1994
54F 74F243
Quad Bus Transceiver with TRI-STATE
Outputs
General Description
The 'F243 is a quad bus transmitter receiver designed for
4-line asynchronous 2-way data communications between
data busses
Features
Y
2-Way asynchronous data bus communication
Y
Input clamp diodes limit high-speed termination effects
Y
Guaranteed 4000V minimum ESD protection
Commercial
Military
Package
Package Description
Number
54F243DM (Note 2)
J14A
14-Lead Ceramic Dual-In-Line
74F243SC (Note 1)
M14A
14-Lead (0 150 Wide) Molded Small Outline JEDEC
54F243FM (Note 2)
W14B
14-Lead Cerpack
54F243LM (Note 2)
E20A
20-Lead Ceramic Leadless Chip Carrier Type C
Note 1
Devices also available in 13
reel Use Suffix
e
SCX
Note 2
Military grade device with environmental and burn-in processing Use suffix
e
DMQB FMQB and LMQB
Logic Symbol
IEEE IEC
TL F 9502 3
Connection Diagrams
Pin Assignment
for DIP SOIC and Flatpak
TL F 9502 1
Pin Assignment
for LCC
TL F 9502 2
TRI-STATE
is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation
RRD-B30M105 Printed in U S A
Unit Loading Fan Out
54F 74F
Pin Names
Description
U L
Input I
IH
I
IL
HIGH LOW
Output I
OH
I
OL
E
1
Enable Input (Active LOW)
1 0 1 67
20 mA
b
1 mA
E
2
Enable Input (Active HIGH)
1 0 1 67
20 mA
b
1 mA
A
n
B
n
Inputs
3 5 2 67
70 mA
b
1 6 mA
Outputs
600 106 6(80)
b
12 mA 64 mA(48 mA)
Truth Table
Inputs
Inputs Outputs
E
1
E
2
A
n
B
n
H
e
HIGH Voltage Level
L
e
LOW Voltage Level
L
L
Input
B
e
A
Z
e
High Impedance
N A
e
Not Allowed
L
H
N A
N A
H
L
Z
Z
H
H
A
e
B
Input
2
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 (A
n
B
n
)
Voltage
54F 10% V
CC
2 0
I
OH
e b
12 mA (A
n
B
n
)
74F 10% V
CC
2 4
V
Min
I
OH
e b
3 mA (A
n
B
n
)
74F 10% V
CC
2 0
I
OH
e b
15 mA (A
n
B
n
)
74F 5% V
CC
2 7
I
OH
e b
3 mA (A
n
B
n
)
V
OL
Output LOW
54F 10% V
CC
0 55
V
Min
I
OL
e
48 mA (A
n
B
n
)
Voltage
74F 10% V
CC
0 55
I
OL
e
64 mA (A
n
B
n
)
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 (E
1
E
2
)
Breakdown Test
74F
7 0
I
BVIT
Input HIGH Current
54F
1 0
mA
Max
V
IN
e
5 5V (A
n
B
n
)
Breakdown (I O)
74F
0 5
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 (E
1
E
2
)
I
IH
a
I
OZH
Output Leakage Current
70
m
A
Max
V
OUT
e
2 7V (A
n
B
n
)
I
IL
a
I
OZL
Output Leakage Current
b
1 6
mA
Max
V
OUT
e
0 5V (A
n
B
n
)
I
OS
Output Short-Circuit Current
b
100
b
225
mA
Max
V
OUT
e
0V (A
n
B
n
)
I
CCH
Power Supply Current
64
80
mA
Max
V
O
e
HIGH
I
CCL
Power Supply Current
64
90
mA
Max
V
O
e
LOW
I
CCZ
Power Supply Current
71
90
mA
Max
V
O
e
HIGH Z
3
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
2 5
4 0
5 2
2 0
6 5
2 0
6 2
ns
t
PHL
A
n
to B
n
B
n
to A
n
2 5
4 0
5 2
2 0
8 5
2 0
6 5
t
PZH
Output Enable Time
2 0
4 3
5 7
2 0
8 0
2 0
6 7
t
PZL
E
1
to B
n
E
2
to A
n
2 0
5 8
7 5
2 0
10 5
2 0
8 5
ns
t
PHZ
Output Disable Time
2 0
4 5
6 0
1 5
7 5
1 5
7 0
t
PLZ
E
1
to B
n
E
2
to A
n
2 0
4 5
6 0
2 0
8 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
243
S
C
X
Temperature Range Family
Special Variations
74F
e
Commercial
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
D
e
Ceramic DIP
C
e
Commercial (0 C to
a
70 C)
F
e
Flatpak
M
e
Military (
b
55 C to
a
125 C)
L
e
Leadless Chip Carrier (LCC)
S
e
Small Outline SOIC JEDEC
Physical Dimensions
inches (millimeters)
20-Lead Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
4
Physical Dimensions
inches (millimeters) (Continued)
14-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J14A
14-Lead (0 150 Wide) Molded Small Outline Package JEDEC (S)
NS Package Number M14A
5
54F74F243
Quad
Bus
Transceiver
with
TRI-STATE
Outputs
Physical Dimensions
inches (millimeters) (Continued)
14-Lead Ceramic Flatpak (F)
NS Package Number W14B
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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National Semiconductor
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Corporation
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