鈥?/div>
Multiple chip enables for easy expansion
3.3V core power supply
2.5V or 3.3V I/O operation with separate V
DDQ
Linear or interleaved burst control
Snooze mode for reduced power-standby
Common data inputs and data outputs
Logic block diagram
LBO
CLK
ADV
ADSC
ADSP
A[20:0]
CLK
CS
CLR
Burst logic
Q
21
CS
Address
D
21
19 21
2M x 18
Memory
array
18
18
register
CLK
GWE
BW
b
BWE
BW
a
CE0
CE1
CE2
D
DQb
Q
CLK
D
DQa
Q
Byte Write
registers
Byte Write
CLK
D
registers
2
OE
Enable
Q
register
CE
CLK
ZZ
Output
registers
CLK
Input
registers
CLK
Power
down
D
Enable
Q
delay
register
CLK
OE
18
DQ[a,b]
Selection guide
Minimum cycle time
Maximum clock frequency
Maximum clock access time
Maximum operating current
Maximum standby current
Maximum CMOS standby current (DC)
-200
5
200
3.1
450
170
90
-166
6
166
3.5
400
150
90
-133
7.5
133
3.8
350
140
90
Units
ns
MHz
ns
mA
mA
mA
12/23/04, v.1.5
Alliance Semiconductor
1 of 19
Copyright 漏 Alliance Semiconductor. All rights reserved.