as7c33256pfs18a-166tqi Alliance Memory, Inc, as7c33256pfs18a-166tqi Datasheet - Page 4

• Manufacturer Part Number: as7c33256pfs18a-166tqi
• Description: 3.3v 256k 16/18 Pipeline Burst Synchronous Sram
• Manufacturer: Alliance Memory, Inc

Synchronous truth table
Key: X = Don’t Care, L = Low, H = High.
1
2
3 For write operation following a READ,
time.
Recommended operating conditions
* V
† Input voltage ranges apply to 3.3V I/O operation. For 2.5V I/O operation, contact factory for input specifications.
See “Write enable truth table” on page 2 for more information.
Q in flow through mode
Supply voltage
3.3V I/O supply
voltage
2.5V I/O supply
voltage
Input voltages
Ambient operating temperature
3/14/01; V.1.0
CE0
IL
H
H
H
H
H
H
H
X
X
X
X
X
X
L
L
L
L
L
L
L
L
L
min = –2.0V for pulse width less than 0.2 × t
Parameter
CE1
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
†
CE2
H
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
ADSP
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
X
X
X
L
L
L
L
OE must be HIGH before the input data set up time and held HIGH throughout the input hold
Address and
control pins
I/O pins
ADSC
H
H
H
H
H
H
H
H
H
H
H
H
X
X
X
X
L
L
L
L
L
L
RC
.
ADV
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
Alliance Semiconductor
WEn1
X
X
X
X
X
X
X
T
T
T
T
T
F
F
F
F
F
F
F
F
F
F
Symbol
V
V
V
V
V
V
V
V
V
V
DDQ
DDQ
T
SSQ
SSQ
DD
IH
IH
SS
IL
IL
A
OE
H
H
H
H
H
H
X
X
X
X
X
X
X
X
X
X
L
L
L
L
L
L
®
Address accessed
3.135
3.135
External
External
External
External
External
–0.5
–0.5
Current
Current
Current
Current
Current
Current
2.35
Min
0.0
0.0
0.0
2.0
2.0
Next
Next
Next
Next
Next
Next
0
NA
NA
NA
NA
NA
*
*
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
L to H
Nominal
CLK
3.3
0.0
3.3
0.0
2.5
0.0
–
–
–
–
–
Suspend write
Suspend write
AS7C33256PFS16A
AS7C33256PFS18A
Suspend read
Suspend read
Suspend read
Suspend read
Begin write
Cont. write
Cont. write
Begin read
Begin read
Begin read
Begin read
Cont. read
Cont. read
Cont. read
Cont. read
Operation
Deselect
Deselect
Deselect
Deselect
Deselect
V
V
DDQ
DD
Max
3.6
0.0
3.6
0.0
2.9
0.0
0.8
0.8
70
+ 0.3
+ 0.3
P. 4 of 11
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
Hi Z
DQ
Unit
D
Q
Q
Q
Q
D
D
D
D
V
V
V
V
V
3
C
2
2