1999 Fairchild Semiconductor Corporation
DS009530
www.fairchildsemi.com
October 1988
Revised August 1999
7
4F2243 Q
u
a
d
Bus T
r
ansc
eiver
74F2243
Quad Bus Transceiver
with 25
Series Resistors in the Outputs
General Description
The 74F2243 is a quad bus transmitter/receiver which can
be used for 4-line asynchronous 2-way data communica-
tions between data busses. It is designed to drive the
capacitive inputs of MOS memory drivers, address drivers,
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
25
series resistors in outputs eliminate the need for
external resistors
s
2-Way asynchronous data bus communication
s
3-STATE outputs
s
12 mA source current
s
Designed to drive the capacitive inputs of MOS devices
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter "X" to the ordering code.
Logic Symbol
IEEE/IEC
Connection Diagram
Truth Table
H
=
HIGH Voltage Level
Z
=
High Impedance
L
=
LOW Voltage Level
N/A
=
Not Allowed
Unit Loading/Fan Out
Order Number
Package Number
Package Description
74F2243SC
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Inputs
Inputs/Outputs
E
1
E
2
A
n
B
n
L
L
Input
B
=
A
L
H
N/A
N/A
H
L
Z
Z
H
H
A
=
B
Input
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
A/
-
1 mA
E
2
Enable Input (Active HIGH)
1.0/1.67
20
A/
-
1 mA
A
n
, B
n
Inputs
3.5/2.67
70
A/
-
1.6 mA
Outputs
750/20
-
15 mA/12 mA
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2
74F2243
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
AC 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
+
150C
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
I
OH
=
-
3 mA (A
n
, B
n
)
Voltage
10% V
CC
2.0
V
Min
I
OH
=
-
15 mA (A
n
, B
n
)
5% V
CC
2.7
I
OH
=
-
3 mA (A
n
, B
n
)
V
OL
Output LOW
0.50
V
Min
I
OL
=
1 mA (A
n
, B
n
)
Voltage
0.75
I
OL
=
12 mA (A
n
, B
n
)
I
IH
Input HIGH Current
20
A
Max
V
IN
=
2.7V (E
1
, E
2
)
I
BVI
Input HIGH Current
100
A
Max
V
IN
=
7.0V (E
1
, E
2
)
Breakdown Test
I
BVIT
Input HIGH Current
1.0
mA
Max
V
IN
=
5.5V (A
n
, B
n
)
Breakdown Test (I/O)
I
IL
Input LOW Current
-
1.0
mA
Max
V
IN
=
0.5V (E
1
, E
2
)
I
IH
+
I
OZH
Output Leakage Current
70
A
Max
V
OUT
=
2.7V (A
n
, B
n
)
I
IL
+
I
OZL
Output Leakage Current
-
1.6
mA
Max
V
OUT
=
0.5V (A
n
, B
n
)
I
OS
Output Short-Circuit Current
-
100
-
225
mA
Max
V
OUT
=
0V (A
n
, B
n
)
I
CEX
Output HIGH Leakage Current
250
A
Max
V
OUT
=
V
CC
I
CCH
Power Supply Current
64
80
mA
Max
V
O
=
HIGH
I
CCL
Power Supply Current
64
90
mA
Max
V
O
=
LOW
I
CCZ
Power Supply Current
71
90
mA
Max
V
O
=
HIGH Z
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
1.5
7.0
1.5
7.0
ns
t
PHL
A
n
to B
n
, B
n
to A
n
2.5
8.0
2.0
8.0
t
PZH
Output Enable Time
1.5
9.0
1.0
9.5
ns
t
PZL
E
1
to B
n
, E
2
to A
n
2.5
11.5
2.5
12.0
t
PHZ
Output Disable Time
1.5
9.0
1.0
9.5
t
PLZ
E
1
to B
n
, E
2
to A
n
1.5
8.5
1.5
9.5
3
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7
4F2243 Q
u
a
d
Bus T
r
ansc
eiver
Physical Dimensions
inches (millimeters) unless otherwise noted
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Package Number M14A
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.
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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