PI74LCX16543 데이터 시트보기 (PDF) - Pericom Semiconductor
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PI74LCX16543 Datasheet PDF : 6 Pages
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PI74LCX16543
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Product Pin Description
Pin Name Description
xOEAB
A-to-B Output Enable Input (Active LOW)
XOEBA
XCEAB
xCEBA
B-to-A Output Enable Input (Active LOW)
A-to-B Enable Input (Active LOW)
B-to-A Enable Input (Active LOW)
XLEAB
XLEBA
XAX
XBX
GND
A-to-B Latch Enable Input (Active LOW)
B-to-A Latch Enable Input (Active LOW)
A-to-B Data Inputs or B-to-A 3-State Outputs
B-to-A Data Inputs or B-to-A 3-State Outputs
Ground
VCC
Power
Product Pin Configuration
Truth Table
Inputs
Latch
Status
Output
Buffers
xCEAB xLEAB xOEAB xAx to xBx
xBx
H
X
X
Storing
High Z
X
H
X
Storing
X
X
H
High Z
L
L
L Transparent Current A Input
L
H
L
Storing Previous* A Input
Note:
*Before xLEAB Low-to-High transition.
H = High Voltage Level
L = Low Voltage Level
X = Don’t Care or Irrelevant
Z = High Impedance
A-to-B data flow shown. B-to-A flow control is the same, except
using xCEBA, xLEBA, and xOEBA.
1OEAB
1LEAB
1CEAB
GND
1A0
1A1
VCC
1A2
1A3
1A4
GND
1A5
1A6
1A7
2A0
2A1
2A2
GND
2A3
2A4
2A5
VCC
2A6
2A7
GND
2CEAB
2LEAB
2OEAB
1
56
2
55
3
54
4
53
5
52
6
51
7
50
8
49
9
48
10
47
11
46
12
45
13 56-Pin 44
14
V56
A56
43
15
42
16
41
17
40
18
39
19
38
20
37
21
36
22
35
23
34
24
33
25
32
26
31
27
30
28
29
1OEBA
1LEBA
1CEBA
GND
1B0
1B1
VCC
1B2
1B3
1B4
GND
1B5
1B6
1B7
2B0
2B1
2B2
GND
2B3
2B4
2B5
VCC
2B6
2B7
GND
2CEBA
2LEBA
2OEBA
2
PS2092B 09/19/02
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