FAIRCHILD 74F243SC

Revised July 1999
74F243
Quad Bus Transceiver with 3-STATE Outputs
General Description
Features
The 74F243 is a quad bus transmitter/receiver designed for
4-line asynchronous 2-way data communications between
data busses.
■ 2-Way asynchronous data bus communication
■ Input clamp diodes limit high-speed termination effects
Ordering Code:
Order Code
Package Number
74F243SC
Package Description
M14A
14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol
Connection Diagram
IEEE/IEC
Truth Table
Inputs
H = HIGH Voltage Level
L = LOW Voltage Level
Inputs/Outputs
E1
E2
An
Bn
L
L
Input
B=A
N/A
L
H
N/A
H
L
Z
Z
H
H
A=B
Input
Z = High Impedance
N/A = Not Allowed
Unit Loading/Fan Out
Pin
U.L.
Description
Names
Input IIH/IIL
HIGH/LOW Output IOH/IOL
E1
Enable Input (Active LOW)
1.0/1.67
20 µA/−1 mA
E2
Enable Input (Active HIGH)
1.0/1.67
20 µA/−1 mA
3.5/2.67
70 µA/−1.6 mA
An, Bn
Inputs
600/106.6 −12 mA/64 mA
(80)
(48 mA)
Outputs
© 1999 Fairchild Semiconductor Corporation
DS009502
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74F243 Quad Bus Transceiver with 3-STATE Outputs
April 1988
74F243
Absolute Maximum Ratings(Note 1)
Recommended Operating
Conditions
Storage Temperature
−65°C to +150°C
Ambient Temperature under Bias
−55°C to +125°C
Free Air Ambient Temperature
Junction Temperature under Bias
−55°C to +150°C
Supply Voltage
0°C to +70°C
+4.5V to +5.5V
−0.5V to +7.0V
VCC Pin Potential to Ground Pin
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 VCC = 0V)
Standard Output
−0.5V to VCC
3-STATE Output
−0.5V to +5.5V
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.
Current Applied to Output
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
twice the rated IOL (mA)
in LOW State (Max)
ESD Last Passing Voltage (Min)
4000V
DC Electrical Characteristics
Symbol
Parameter
Min
Typ
Max
VCC
V
Conditions
Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
VCD
Input Clamp Diode Voltage
−1.2
V
Min
IIN = −18 mA
VOH
Output HIGH
10% VCC
2.4
Voltage
10% VCC
2.0
V
Min
IOH = −15 mA (An, Bn)
5% VCC
2.7
Output LOW
10% VCC
0.55
V
Min
IOL = 64 mA (An, Bn)
5.0
µA
Max
VIN = 2.7V
7.0
µA
Max
VIN = 7.0V (E1, E2)
0.5
mA
Max
VIN = 5.5V (An, Bn)
50
µA
Max
VOUT = VCC
V
0.0
3.75
µA
0.0
−1.0
mA
Max
VIN = 0.5V (E1, E2)
70
µA
Max
VOUT = 2.7V (An, B n)
VOL
2.0
Units
VIH
IOH = −3 mA (An, Bn)
Input HIGH
Current
IBVI
Input HIGH Current
IBVIT
Input HIGH Current
ICEX
Output HIGH
Breakdown Test
Breakdown (I/O)
Leakage Current
VID
Input Leakage
Test
IOD
4.75
Output Leakage
Circuit Current
IIL
Input LOW Current
IIH + IOZH
Output Leakage Current
IIL + IOZL
Output Leakage Current
IOS
Output Short-Circuit Current
ICCH
Power Supply Current
ICCL
Power Supply Current
ICCZ
Power Supply Current
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Recognized as a LOW Signal
IOH = −3 mA (An, Bn)
Voltage
IIH
Recognized as a HIGH Signal
IID = 1.9 µA
All Other Pins Grounded
VIOD = 150 mV
All Other Pins Grounded
−1.6
mA
Max
VOUT = 0.5V (An, B n)
−225
mA
Max
VOUT = 0V (An, Bn)
64
80
mA
Max
VO = HIGH
64
90
mA
Max
VO = LOW
71
90
mA
Max
VO = HIGH Z
−100
2
74F243
AC Electrical Characteristics
Symbol
Parameter
TA = +25°C
TA = −55°C to +125°C
TA = 0°C to +70°C
VCC = +5.0V
VCC = 5.0V
VCC = 5.0V
CL = 50 pF
CL = 50 pF
CL = 50 pF
Min
Typ
Max
Min
Max
Min
Max
tPLH
Propagation Delay
2.5
4.0
5.2
2.0
6.5
2.0
6.2
tPHL
An to Bn, Bn to An
2.5
4.0
5.2
2.0
8.5
2.0
6.5
tPZH
Output Enable Time
2.0
4.3
5.7
2.0
8.0
2.0
6.7
tPZL
E1 to Bn, E2 to An
2.0
5.8
7.5
2.0
10.5
2.0
8.5
tPHZ
Output Disable Time
2.0
4.5
6.0
1.5
7.5
1.5
7.0
tPLZ
E1 to Bn, E2 to An
2.0
4.5
6.0
2.0
8.5
2.0
7.0
3
Units
ns
ns
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74F243 Quad Bus Transceiver with 3-STATE Outputs
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.
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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:
2. A critical component in any component of a life support
device or system whose failure to perform can be reasonably expected to cause the failure of the life support
device or system, or to affect its safety or effectiveness.
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 reasonably expected to result in a significant injury to the
user.
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