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參數(shù)資料
| 型號(hào)： | 74F243DC |
| 英文描述： | 4-Bit Bus Transceiver |
| 中文描述： | 4位總線收發(fā)器 |
| 文件頁(yè)數(shù)： | 3/12頁(yè) |
| 文件大?。?/td> | 147K |
| 代理商： | 74F243DC |
Philips Semiconductors
Product specification
74F240/74F240A/
74F241/74F241A
Buffers
3
PIN CONFIGURATION FOR 74F240/74F240A
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
SF00320
OEa
Ia0
Yb0
Ia1
Yb1
Ia2
Yb2
Ia3
Yb3
GND
V
CC
OEb
Ya0
Ib0
Ya1
Ib1
Ya2
Ib2
Ya3
Ib3
LOGIC SYMBOL FOR 74F240/74F240A
V
= Pin 20
GND = Pin 10
SF00321
1
19
OEa
OEb
2
4
6
8
17
15
13
11
18
16
14
12
3
5
7
9
Ia0
Ia1
Ia2
Ia3
Ib0
Ib1
Ib2 Ib3
Ya0 Ya1 Ya2 Ya3 Yb0 Yb1 Yb2 Yb3
IEC/IEEE SYMBOL FOR 74F240/74F240A
2D
1
2
SF00322
1
19
EN1
EN2
4
2
6
8
17
15
13
11
18
16
14
12
3
5
7
9
LOGIC DIAGRAM FOR 74F240/74F240A
V
= Pin 20
GND = Pin 10
SF00323
Yb0
Yb1
Yb2
Yb3
3
5
7
9
17
15
13
11
10
Ya0
Ya1
Ya2
Ya3
18
16
14
12
2
4
6
8
1
Ib0
Ib1
Ib2
Ib3
OEb
Ia0
Ia1
Ia2
Ia3
OEa
FUNCTION TABLE FOR 74F240/74F240A
INPUTS
OUTPUTS
OEa
Ia
OEb
Ib
Ya
Yb
L
L
L
L
H
H
L
H
L
H
L
L
H
X
H
X
Z
Z
Notes to function table for 74F240/74F240A
H =
High voltage level
L
=
Low voltage level
X =
Don’t care
Z =
High impedance ”off” state
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