AS7C33512PFS16A
AS7C33512PFS18A
®
Synchronous truth table
Address
accessed
1
CE0
H
L
CE1
X
L
CE2 ADSP ADSC ADV
WEn
X
X
X
X
X
X
X
F
OE
X
X
X
X
X
L
CLK
Operation
Deselect
DQ
Hi−Z
Hi−Z
Hi−Z
Hi−Z
Hi−Z
Hi−Z2
Hi−Z
Hi−Z2
Hi−Z
Q
X
X
X
H
H
L
X
L
L
X
L
X
X
X
X
X
X
X
X
X
L
NA
NA
L to H
L to H
L to H
L to H
L to H
Lto H
Lto H
Lto H
Lto H
Lto H
L to H
L to H
L to H
Lto H
L to H
L to H
L to H
Lto H
L to H
L to H
L to H
L to H
Deselect
L
L
H
L
NA
Deselect
L
X
X
H
H
H
H
X
X
X
X
X
X
X
X
H
X
X
X
X
X
L
NA
Deselect
L
H
L
NA
Deselect
L
X
X
L
External
External
External
External
Next
Begin read
Begin read
Begin read
Begin read
Cont. read
Cont. read
Suspend read
Suspend read
Cont. read
Cont. read
Suspend read
Suspend read
Begin write
Cont. write
Cont. write
Suspend write
Suspend write
L
L
L
H
L
L
L
H
H
H
H
H
H
X
X
X
X
H
H
X
H
X
L
L
L
F
H
L
X
X
X
X
H
H
H
H
L
X
X
X
X
X
X
X
X
L
H
H
H
H
H
H
H
H
L
F
L
F
H
L
Next
Hi−Z
Q
H
H
L
F
Current
Current
Next
F
H
L
Hi−Z
Q
F
L
F
H
L
Next
Hi−Z
Q
H
H
X
L
F
Current
Current
External
Next
F
H
X
X
X
X
X
Hi−Z
D3
T
T
T
T
T
X
H
X
H
X
X
X
X
H
H
H
H
D
L
Next
D
H
H
Current
Current
D
D
Key: X = don’t care, L = low, H = high.
1
2
3
See “Write enable truth table” on page 2 for more information.
Q in flow-through mode
For WRITE operation following a READ, OE must be high before the input data set up time and held high throughout the input hold time.
Recommended operating conditions
Parameter
Symbol
Min
3.135
0.0
Nominal
Max
3.465
0.0
Unit
VDD
3.3
0.0
3.3
0.0
2.5
0.0
–
Supply voltage
V
V
SS
VDDQ
3.135
0.0
3.465
0.0
3.3V I/ O supply
voltage
V
V
V
V
SSQ
VDDQ
2.35
0.0
2.9
2.5V I/ O supply
voltage
V
0.0
SSQ
V
2.0
–0.52
VDD + 0.3
0.8
Address and
control pins
IH
V
–
IL
Input voltages1
V
2.0
–
VDDQ + 0.3
0.8
IH
I/ O pins
V
V
–0.52
0
–
IL
Ambient operating temperature
TA
–
70
° C
1 Input voltage ranges apply to 3.3V I/ O operation. For 2.5V I/ O operation, contact factory for input specifications.
2 V min = –2.0V for pulse width less than 0.2 × t
IL
.
RC
5/ 9/ 03, v.1.8.1
Alliance Semiconductor
4 of 13
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
