N74F240D 查看數據表（PDF） - Philips Electronics
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N74F240D Datasheet PDF : 12 Pages
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Philips Semiconductors
Buffers
Product specification
74F240/74F240A/
74F241/74F241A
PIN CONFIGURATION FOR 74F241/74F241A
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
SF00324
LOGIC SYMBOL FOR 74F241/74F241A
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
SF00325
FUNCTION TABLE FOR 74F241/74F241A
INPUTS
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
H
L
L
L
L
H
H
H
H
H
H
X
L
X
Z
Z
Notes to function table for 74F241/74F241A
H = High voltage level
L = Low voltage level
X = Don’t care
Z = High impedance ”off” state
IEC/IEEE SYMBOL FOR 74F241/74F241A
1
EN1
19
EN2
2
2D
1
18
4
16
6
14
8
12
17
2
3
15
5
13
7
11
9
SF00326
LOGIC DIAGRAM FOR 74F241/74F241A
2
Ia0
4
Ia1
6
Ia2
Ia3 8
OEa 1
VCC = Pin 20
GND = Pin 10
18
Ya0
16
Ya1
14
Ya2
12 Ya3
17
Ib0
15
Ib1
13
Ib2
Ib3 11
OEb 10
3
Yb0
5
Yb1
7
Yb2
9 Yb3
SF00327
January 2, 1991
4
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