PI74LPT652R 데이터 시트보기 (PDF) - Pericom Semiconductor
부품명
상세내역
일치하는 목록
PI74LPT652R Datasheet PDF : 6 Pages
| |||
PI74LPT646
PI74LPT652
123456789012345678901234567890121234567890123456789012345678901212345678901234356.378V901823-4B56I7T890R12E12G345I6S78T90E12R34E56D789T01R234A56N78S90C12E12I3V456E78R90S12
PI74LPT646
PI74LPT652
Product Pin Configuration Product Pin Configuration
CPAB
SAB
DIR
A0
A1
A2
A3
A4
A5
A6
A7
GND
1
24
2
23
3
22
4 24-PIN 21
5 L24 20
6 Q24 19
7 R24 18
8 S24 17
9
16
10
15
11
14
12
13
VCC
CPBA
SBA
G
B0
B1
B2
B3
B4
B5
B6
B7
CPAB
SAB
GAB
A0
A1
A2
A3
A4
A5
A6
A7
GND
1
24
2
23
3
22
4 24-PIN 21
5 L24 20
6 Q24 19
7 R24 18
8 S24 17
9
16
10
15
11
14
12
13
VCC
CPBA
SBA
GBA
B0
B1
B2
B3
B4
B5
B6
B7
Product Pin Description
Pin Name
A0-A7
B0-B7
CPAB, CPBA
SAB, SBA
DIR, G
GAB, GBA
GND
VCC
Description
Data Register A Inputs
Data Register B Outputs
Data Register B Inputs
Data Register A Outputs
Clock Pulse Inputs
Output Data Source Select Inputs
Output Enable Inputs (LPT646)
Output Enable Inputs (LPT652)
Ground
Power
PI74LPT646 Truth Table
Function/Operation
Isolation
Store A and B Data
Real Time B Data to A Bus
Stored B Data to A Bus
Real Time A Data to B Bus
Stored A Data to B Bus
Inputs
DATA I/O(2)
G
DIR CPAB CPBA SAB SBA A0-A7 B0-B7
H
X H or L H or L X
X
Input Input
H
X
↑
↑
X
X
L
L
X
X
X
L Output Input
L
L
X H or L X
H
L
H
X
X
L
X
Input Output
L
H H or L X
H
X
PI74LPT652 Truth Table
Function/Operation
Isolation
Store A and B Data
Store A, Hold B
Store A in Both Registers
Hold A, Store B
Store B in Both Registers
Real Time B Data to A Bus
Stored B Data to A Bus
Real Time A Data to B Bus
Stored A Data to B Bus
Stored A Data to B Bus and
Stored B Data to A Bus
Inputs
GAB GBA CPAB CPBA SAB
L
H H or L H or L X
L
H
↑
↑
X
X
H
↑
H or L
X
H
H
↑
↑
X(2)
L
X
H or L
↑
X
L
L
↑
↑
X
L
L
X
X
X
L
L
X H or L X
H
H
X
X
L
H
H H or L X
H
H
L H or L H or L H
SBA
X
X
X
X
X
X(2)
L
H
X
X
H
DATA I/O(2)
A0-A7 B0-B7
Input
Input
Input Unspecified(1)
Input Output
Unspecified(1) Input
Output Input
Output Input
Input Output
Output Output
Notes:
1. The data output functions may be enabled or disabled by various signals at the GAB or GBA 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. Select control = L: clocks can occur simultaneously.
Select control = H: clocks must be staggered in order to load both registers.
H = High Voltage Level; L = Low Voltage Level; X = Don't Care; ↑ = LOW-to-HIGH transition
2
PS2064A 01/15/97
Share Link: 