PI74ALVCH16646 Просмотр технического описания (PDF) - Pericom Semiconductor
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PI74ALVCH16646 Datasheet PDF : 6 Pages
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PI74ALVCH16646
16-Bit Bus Transceiver and Register
with 3-STATE Outputs 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122
Product Pin Configuration
1DIR
1CLKAB
1SAB
GND
1A1
1A2
VCC
1A3
1A4
1A5
GND
1A6
1A7
1A8
2A1
2A2
2A3
GND
2A4
2A5
2A6
VCC
2A7
2A8
GND
2SAB
2CLKAB
2DIR
1
56
2
55
3
54
4
53
5
52
6 56-PIN 51
7 V56 50
8 A56 49
9
48
10
47
11
46
12
45
13
44
14
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
1OE
1CLKBA
1SBA
GND
1B1
1B2
VCC
1B3
1B4
1B5
GND
1B6
1B7
1B8
2B1
2B2
2B3
GND
2B4
2B5
2B6
VCC
2B7
2B8
GND
2SBA
2CLKBA
2OE
Product Pin Description
Pin Name
Description
xOE
Output Enable Inputs (Active LOW)
xDIR
Direction Control
xCLKAB, xCLKBA Clock Pulse Inputs
xSAB, xSBA
Select Control Inputs
xAx
Data Register A Inputs
Data Register B Outputs
xBx
Data Register B Inputs
Data Register A Outputs
GND
Ground
VCC
Power
Truth Table(2)
Function
Store A, B Unspecified (1)
Store B, A Unspecified (1)
Isolation
Store A and B Data
Real Time A Data to B Bus
Stored A Data to B Bus
Real Time B Data to A Bus
Stored B Data to A Bus
Inputs
Data I/O
xOE xDIR xCLKAB xCLKBA xSAB xSBA
xAx
xBx
X
X
↑
X
X
X
X
X
X
Input
Unspecified (1)
↑
X
X
Unspecified (1)
Input
H
X
H or L
H or L
X
H
X
↑
↑
X
X Input Disable Input Disable
X
Input
Input
L
H
X
X
L
X
Input
L
H
H or L
X
H
X
Input
Output
Output
L
L
L
L
X
X
X
L
Output
X
H or L
X
H
Output
Input
Input
Note:
1. The data output functions may be enabled or disabled by various signals at the xOE or xDIR inputs. Data input functions are always
enabled, i.e., data at the bus pins will be stored on every LOW-to-HIGH transition on the clock inputs.
2. H = High Voltage Level
X = Don't Care
L = Low Voltage Level
↑ = LOW-to-HIGH Transition
2
PS8102A 10/07/98
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