74F2240 データシートの表示（PDF） - Philips Electronics
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74F2240 Datasheet PDF : 10 Pages
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Philips Semiconductors
Octal buffers
Product specification
74F2240, 74F2241
PIN CONFIGURATION
74F2241
OEa 1
Ia0 2
Yb0 3
Ia1 4
Yb1 5
Ia2 6
Yb2 7
Ia3 8
Yb3 9
GND 10
20 VCC
19 OEb
18 Ya0
17 Ib0
16 Ya1
15 Ib1
14 Ya2
13 Ib2
12 Ya3
11 Ib3
LOGIC SYMBOL
74F2241
2 4 6 8 17 15 13 11
Ia0 Ia1 Ia2 Ia3 Ib0 Ib1 Ib2 Ib3
1
OEa
19
OEb
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
VCC = Pin 20
GND = Pin 10
18 16 14 12 3 5 7 9
SF00565
IEC/IEEE SYMBOL
74F2241
1
EN1
19
EN2
2
2D
1
18
4
16
6
14
8
12
17
2
3
15
5
13
7
11
9
December 13, 1990
SF00564
LOGIC DIAGRAM FOR 74F2240
2
Ia0
18
Ya0
17
Ib0
Ia1 4
15
Ya1
15
Ib1
Ia2 6
14
Ya2
13
Ib2
Ia3 8
12
Ya3
11
Ib3
OEa 1
VCC = Pin 20
GND = Pin 10
10
OEb
LOGIC DIAGRAM FOR 74F2241
Ia0 2
18
Ya0
17
Ib0
Ia1 4
15
Ya1
15
Ib1
Ia2 6
14
Ya2
13
Ib2
Ia3 8
12
Ya3
11
Ib
OEa 1
VCC = Pin 20
GND = Pin 10
10
OEb
2
Yb0
5
Yb1
7
Yb2
9
Yb3
SF00567
2
Yb0
5
Yb1
7
Yb2
9
Yb3
SF00568
FUNCTION TABLE FOR 74F2240
INPUTS
OEa
Ia
OEb
Ib
L
L
L
L
L
H
L
H
H
X
H
X
Notes to function table for 74F2240
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
OUTPUTS
Ya
Yb
H
H
L
L
Z
Z
SF00566
FUNCTION TABLE FOR 74F2241
INPUTS
OEa
Ia
OEb
Ib
L
L
H
L
L
H
H
H
H
X
L
X
Notes to function table for 74F2241
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
OUTPUTS
Ya
Yb
L
L
H
H
Z
Z
3
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