Motorola MC74F244DW, MC74F244N, MC74F241N, MC74F240N, MC74F240DW Datasheet
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MC54/74F240
MC54/74F241 OCTAL BUFFER/LINE DRIVER MC54/74F244 WITH 3-STATE OUTPUTS
The F240, F241 and F244 are octal buffers and line drivers designed to be |
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employed as memory address drivers, clock drivers, and bus-oriented trans- |
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mitters/receivers which provide improved PC board density. |
OCTAL BUFFER/LINE DRIVER |
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• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers |
WITH 3-STATE OUTPUTS |
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• Outputs Sink 64 mA |
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FAST SCHOTTKY TTL |
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• 15 mA Source Current |
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•Input Clamp Diodes Limit High-Speed Termination Effects
•ESD > 4000 Volts
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CONNECTION DIAGRAMS |
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J SUFFIX |
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CERAMIC |
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MC54/74F240 |
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20 |
CASE 732-03 |
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VCC |
OEb |
Ya0 |
Ib0 |
Ya1 |
Ib1 |
Ya2 |
Ib2 |
Ya3 |
Ib3 |
1 |
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20 |
19 |
18 |
17 |
16 |
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N SUFFIX |
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PLASTIC |
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CASE 738-03 |
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20 |
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1 |
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OEa |
Ia0 |
Yb0 |
Ia1 |
Yb1 |
Ia2 |
Yb2 |
Ia3 |
Yb3 |
GND |
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DW SUFFIX |
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20 |
SOIC |
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CASE 751D-03 |
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1 |
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MC54/74F241 |
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VCC |
OEb |
Ya0 |
Ib0 |
Ya1 |
Ib1 |
Ya2 |
Ib2 |
Ya3 |
Ib3 |
ORDERING INFORMATION |
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MC54FXXXJ |
Ceramic |
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MC74FXXXN |
Plastic |
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MC74FXXXDW SOIC |
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a |
Ia0 |
Yb0 |
Ia1 |
Yb1 |
Ia2 |
Yb2 |
Ia3 |
Yb3 |
GND |
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OE |
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MC54/74F244 |
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VCC OEb Ya0 |
Ib0 |
Ya1 |
Ib1 |
Ya2 |
Ib2 |
Ya3 |
Ib3 |
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1 |
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10 |
OEa |
Ia0 |
Yb0 |
Ia1 |
Yb1 |
Ia2 |
Yb2 |
Ia3 |
Yb3 |
GND |
FAST AND LS TTL DATA
4-108
MC54/74F240 •MC54/74F241 •MC54/74F244
FUNCTION TABLE |
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FUNCTION TABLE |
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FUNCTION TABLE |
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MC54/74F240 |
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MC54/74F241 |
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MC54/74F244 |
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Inputs |
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Outputs |
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Inputs |
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Outputs |
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Inputs |
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Outputs |
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OE |
a |
Ia |
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OE |
b |
Ib |
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Y |
a |
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Y |
b |
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OE |
a |
Ia |
OEb |
Ib |
Ya |
Yb |
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OE |
a |
Ia |
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OE |
b |
Ib |
Ya |
Yb |
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L |
L |
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L |
L |
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H |
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H |
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L |
L |
H |
L |
L |
L |
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L |
L |
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L |
L |
L |
L |
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L |
H |
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L |
H |
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L |
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L |
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L |
H |
H |
H |
H |
H |
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L |
H |
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L |
H |
H |
H |
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H |
X |
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H |
X |
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Z |
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Z |
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H |
X |
L |
X |
Z |
Z |
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H |
X |
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H |
X |
Z |
Z |
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H = HIGH Voltage Level; L = LOW Voltage Level; X = Don't Care; Z = High Impedance
GUARANTEED OPERATING RANGES
Symbol |
Parameter |
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Typ |
Max |
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VCC |
Supply Voltage |
54, 74 |
4.5 |
5.0 |
5.5 |
V |
TA |
Operating Ambient Temperature Range |
54 |
±55 |
25 |
125 |
°C |
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74 |
0 |
25 |
70 |
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IOH |
Output Current Ð High |
54 |
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±12 |
mA |
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74 |
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±15 |
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IOL |
Output Current Ð Low |
54 |
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48 |
mA |
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74 |
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64 |
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FAST AND LS TTL DATA
4-109
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