Motorola MC74F244DW, MC74F244N, MC74F241N, MC74F240N, MC74F240DW Datasheet
...
1 2 3 4 5 6 7 8 9
1112
13
141516171819
10
20
1 2 3 4 5 6 7 8
9
1112
13
141516171819
10
20
MC54/74F244
VCCOE
b
GND
OE
a
1 2 3 4 5 6 7 8
9
1112
13
141516171819
MC54/74F240
VCCOE
b
GND
CONNECTION DIAGRAMS
10
20
OE
a
MC54/74F241
VCCOE
b
GND
OE
a
Y
a0Ib0Ya1Ib1Ya2Ib2Ya3Ib3
Ia0Y
b0Ia1Yb1
Ia2Y
b2Ia3Yb3
Y
a0
Ib0Ya1Ib1Ya2Ib2Ya3I
b3
I
a0
Yb0I
a1
Yb1Ia2Yb2Ia3Y
b3
Ya0Ib0Ya1Ib1Ya2Ib2Ya3I
b3
Ia0Yb0Ia1Yb1Ia2Yb2Ia3Y
b3
4-108
FAST AND LS TTL DATA
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
The F240, F241 and F244 are octal buffers and line drivers designed to be
employed as memory address drivers, clock drivers, and bus-oriented transmitters/receivers which provide improved PC board density.
• 3-State Outputs Drive Bus Lines or Buffer Memory Address Registers
• Outputs Sink 64 mA
• 15 mA Source Current
• Input Clamp Diodes Limit High-Speed Termination Effects
• ESD
>
4000 Volts
DW SUFFIX
SOIC
CASE 751D-03
20
1
N SUFFIX
PLASTIC
CASE 738-03
20
1
J SUFFIX
CERAMIC
CASE 732-03
20
1
ORDERING INFORMATION
MC54/74F240
MC54/74F241
MC54/74F244
OCTAL BUFFER/LINE DRIVER
WITH 3-STATE OUTPUTS
FAST SCHOTTKY TTL
MC54FXXXJ Ceramic
MC74FXXXN Plastic
MC74FXXXDW SOIC
4-109
FAST AND LS TTL DATA
MC54/74F240 • MC54/74F241 • MC54/74F244
OEaIaOE
bIbYaYb
H
L
Z
H
L
Z
L
H
X
L
L
H
L
H
X
L
L
H
Inputs Outputs
FUNCTION TABLE
MC54/74F240
H = HIGH Voltage Level; L = LOW Voltage Level; X = Don’t Care; Z = High Impedance
OEaIaOEbIbYaY
b
L
H
Z
L
H
Z
L
H
X
H
H
L
L
H
X
L
L
H
Inputs Outputs
FUNCTION TABLE
MC54/74F241
OEaIaOE
bIbYaYb
L
H
Z
L
H
Z
L
H
X
L
L
H
L
H
X
L
L
H
Inputs Outputs
FUNCTION TABLE
MC54/74F244
GUARANTEED OPERATING RANGES
Symbol Parameter Min Typ Max Unit
V
CC
Supply Voltage 54, 74 4.5 5.0 5.5 V
T
A
Operating Ambient Temperature Range 54 –55 25 125 °C
74 0 25 70
I
OH
Output Current — High 54
74
–12
–15
mA
I
OL
Output Current — Low 54
74
48
64
mA
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