EDI9LC644V 데이터 시트보기 (PDF) - White Electronic Designs => Micro Semi
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EDI9LC644V Datasheet PDF : 25 Pages
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EDI9LC644V
SSRAM AC CHARACTERISTICS (EDI9LC644V)
Parameter
Clock Cycle Time
Clock HIGH Time
Clock LOW Time
Clock to output valid
Clock to output invalid
Clock to output on Low-Z
Clock to output in High-Z
Output Enable to output valid
Output Enable to output in Low-Z
Output Enable to output in High-Z
Address, Control, Data-in Setup Time to Clock
Address, Control, Data-in Hold Time to Clock
Symbol
tKHKH
tKLKH
tKHKL
tKHQV
tKHQX
tKQLZ
tKQHZ
tOELQV
tOELZ
tOEHZ
tS
tH
200MHz
Min
Max
5
1.6
1.6
2.5
1.5
0
1.5
3
2.5
0
3.0
1.5
0.5
166MHz
Min
Max
6
2.4
2.4
3.5
1.5
0
1.5
3.5
3.5
0
3.5
1.5
0.5
150MHz
Min
Max
7
2.6
2.6
3.8
1.5
0
1.5
3.8
3.8
0
3.5
1.5
0.5
133MHz
Min
Max
8
2.8
2.8
4.0
1.5
0
1.5
4.0
4.0
0
3.8
1.5
0.5
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Operation
Deselected Cycle, Power Down
WRITE Cycle, Begin Burst
READ Cycle, Begin Burst
READ Cycle, Begin Burst
READ Cycle, Suspend Burst
READ Cycle, Suspend Burst
READ Cycle, Suspend Burst
READ Cycle, Suspend Burst
WRITE Cycle, Suspend Burst
WRITE Cycle, Suspend Burst
SSRAM OPERATION TRUTH TABLE
Address Used
None
External
External
External
Current
Current
Current
Current
Current
Current
SSCE
H
L
L
L
X
X
H
H
X
H
SSADS
L
L
L
L
H
H
H
H
H
H
SSWE
X
L
H
H
H
H
H
H
L
L
SSOE
X
X
L
H
L
H
L
H
X
X
DQ
High-Z
D
Q
High-Z
Q
High-Z
Q
High-Z
D
D
Note:
1. X means “don’t care”, H means logic HIGH. L means logic LOW.
2. All inputs except SSOE must meet setup and hold times around the rising edge (LOW to HIGH) of SSCLK.
3. Suspending burst generates wait cycle
4. For a write operation following a read operation, SSOE must be HIGH before the input data required setup time plus High-Z time for SSOE and staying
HIGH though out the input data hold time.
5. This device contains circuitry that will ensure the outputs will be in High-Z during power-up.
SSRAM PARTIAL TRUTH TABLE
Function
READ
WRITE one Byte (DQ0-7)
WRITE all Bytes
SSWE
H
L
L
BWE0
X
L
L
BWE1 BWE2
X
X
H
H
L
L
BWE3
X
H
L
5
White Electronic Designs Corporation • (602) 437-1520 • www.whiteedc.com
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