MC54/74F242
MC54/74F243
QUAD BUS TRANCEIVERS
WITH 3-STATE OUTPUTS
The MC54/74F242 and MC54/74F243 are Quad Bus Transmitters/Receivers designed for 4-line asynchronous 2-way data communication between
data buses.
• 2-Way Asynchronous Data Bus Communication
• Input Clamp Diodes Limit High-Speed Termination Effects
• ESD > 4000 Volts
QUAD BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
FAST SCHOTTKY TTL
MC54/74F242 (TOP VIEW)
VCC
14
OE2
13
NC
1B
2B
3B
4B
12
11
10
9
8
J SUFFIX
CERAMIC
CASE 632-08
14
1
1
2
3
4
5
6
7
OE1
NC
1A
2A
3A
4A
GND
N SUFFIX
PLASTIC
CASE 646-06
14
1
D SUFFIX
SOIC
CASE 751A-02
MC54/74F243 (TOP VIEW)
VCC
14
OE2
13
NC
1B
2B
3B
4B
12
11
10
9
8
14
1
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXD
1
2
3
4
5
6
7
OE1
NC
1A
2A
3A
4A
GND
Ceramic
Plastic
SOIC
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA
Operating Ambient Temperature Range
IOH
IOL
Min
Typ
Max
Unit
54,74
4.5
5.0
5.5
V
54
–55
25
125
°C
74
0
25
70
Output Current — High
Output Current — Low
54
–12
74
–15
54
48
74
64
FAST AND LS TTL DATA
4-187
mA
mA
MC54/74F242 • MC54/74F243
FUNCTION TABLE – MC54/74F242
Inputs
FUNCTION TABLE – MC54/74F243
Inputs
Inputs
Inputs
OE1
D
Output
OE2
D
Output
OE1
D
Output
OE2
D
Output
L
L
H
L
X
Z
L
L
L
L
X
Z
L
H
L
L
X
Z
L
H
H
L
X
Z
H
X
Z
H
L
H
H
X
Z
H
L
L
H
X
Z
H
H
L
H
X
Z
H
H
H
H = HIGH Voltage Level; L = LOW Voltage Level ; X = Don’t Care; Z = HIGH Impedance
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
Typ
Max
Test Conditions
VIH
Input HIGH voltage
V
Guaranteed Input HIGH Voltage
VIL
Input LOW Voltage
0.8
V
Guaranteed Input LOW Voltage
VIK
Input Clamp Diode Voltage
–1.2
V
IIN = –18 mA
VCC = MIN
VOH
VOL
Output HIGH Voltage
Output LOW Voltage
2.0
Unit
54
2.0
V
IOH = –12 mA
VCC = 4.50 V
74
2.0
V
IOH = –15 mA
VCC = 4.50 V
54, 74
2.4
V
IOH = –3.0 mA
VCC = 4.50 V
74
2.7
V
IOH = –3.0 mA
VCC = 4.75 V
VCC = MIN
54
0.55
V
IOL = 48 mA
74
0.55
V
IOL = 64 mA
IOZH
Output Off Current HIGH
70
µA
VOUT = 2.7 V
1.0
mA
VOUT = 5.5 V
IOZL
Output Off Current LOW
–1.6
mA
VOUT = 0.5 V
Enable
20
µA
VIN = 2.7 V
Data
70
µA
VIN = 2.7 V
Data
1.0
mA
VIN = 5.5 V
Enable
0.1
mA
VIN = 7.0 V
Enable
-1.0
mA
VIN = 0.5 V
Data
-1.6
mA
VIN = 0.5 V
VOUT = 0 V
VCC = MAX
VCC = MAX
IIH
IIL
IOS
ICCH
ICCL
ICCZ
Input HIGH Current
Input LOW Current
Output Short Circuit Current
74
–100
–225
mA
(Note 2)
54
–100
–275
mA
Power Supply
F242
60
mA
Outputs
Current HIGH
F243
80
mA
HIGH
Power Supply
F242
75
mA
Outputs
Current LOW
F243
90
mA
LOW
Power Supply
F242
75
mA
Outputs
Current OFF
F243
90
mA
OFF
VCC = MAX
VCC = MAX
VCC = MAX
VCC = MAX
VCC = MAX
VCC = MAX
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
FAST AND LS TTL DATA
4-188
MC54/74F242 • MC54/74F243
AC CHARACTERISTICS – MC54/74F242
54/74F
54F
74F
TA = +25°C
TA = -55°C to +125°C
TA = 0°C to 70°C
VCC = +5.0 V
VCC = 5.0 V ±10%
VCC = 5.0 V ± 10%
CL = 50 pF
Symbol
Parameter
CL = 50 pF
CL = 50 pF
Min
Max
Min
Max
Min
Max
Unit
ns
tPLH
Propagation Delay,
2.5
7.0
2.5
9.0
2.5
8.0
tPHL
Data to Output
1.5
4.7
1.5
6.0
1.5
5.7
tPZH
Output Enable Time
2.0
4.7
2.0
6.5
2.0
5.7
4.0
9.0
4.0
12
4.0
10
2.0
5.3
2.0
6.5
2.0
6.3
1.5
6.5
1.5
12.5
1.5
8.0
tPZL
tPHZ
Output Disable Time
tPLZ
ns
ns
AC CHARACTERISTICS – MC54/74F243
Symbol
Parameter
54/74F
54F
74F
TA = +25°C
TA = -55°C to +125°C
TA = 0°C to 70°C
VCC = +5.0 V
VCC = 5.0 V ±10%
VCC = 5.0 V ± 10%
CL = 50 pF
CL = 50 pF
CL = 50 pF
Min
Max
Min
Max
Min
Max
Unit
ns
tPLH
Propagation Delay,
2.5
5.2
2.0
6.5
2.0
6.2
tPHL
Data to Output
2.5
5.2
2.0
8.5
2.0
6.5
tPZH
Output Enable Time
2.0
5.7
2.0
8.0
2.0
6.7
2.0
7.5
2.0
10.5
2.0
8.5
2.0
6.0
1.5
7.5
1.5
7.0
1.5
6.5
2.0
12.5
1.5
7.5
tPZL
tPHZ
tPLZ
Output Disable Time
FAST AND LS TTL DATA
4-189
ns
ns
Case 751A-02 D Suffix
14-Pin Plastic
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14-Pin Plastic
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FAST AND LS TTL DATA
4-190
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◊
FAST AND LS TTL DATA
4-191