鈥?/div>
Byte write enables
Clock enable for operation hold
Multiple chip enables for easy expansion
3.3V core power supply
2.5V or 3.3V I/O operation with separate V
DDQ
Self-timed write cycles
Interleaved or linear burst modes
Snooze mode for standby operation
Logic block diagram
A[19:0]
20
D
Address
register
burst logic
Q
20
CLK
CE0
CE1
CE2
R/W
BWa
BWb
ADV / LD
LBO
ZZ
CLK
D
Q
20
Write delay
addr. registers
CLK
Control
logic
CLK
Write Buffer
2M x 18
SRAM
array
DQ [a,b]
18
D
Data
Q
input
register
CLK
18
18
18
18
CLK
CEN
OE
Output
buffer
18
OE
DQ [a,b]
Selection guide
-75
Minimum cycle time
Maximum clock access time
Maximum operating current
Maximum standby current
Maximum CMOS standby current (DC)
8.5
7.5
325
140
90
-85
10
8.5
300
130
90
-10
12
10
375
130
90
Units
ns
ns
mA
mA
mA
12/23/04, v 1.2
Alliance Semiconductor
P. 1 of 18
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