When driven LOW, count sequence follows linear convention. This signal is
internally pulled HIGH.
Flow-through mode.When LOW, enables single register flow-through mode.
Connect to V
DD
if unused or for pipelined operation.
Sleep. Places device in low power mode; data is retained. Connect to GND if unused.
FT
ZZ
Absolute maximum ratings
Parameter
Power supply voltage relative to GND
Input voltage relative to GND (input pins)
Input voltage relative to GND (I/O pins)
Power dissipation
DC output current
Storage temperature (plastic)
Temperature under bias
Symbol
V
DD
, V
DDQ
V
IN
V
IN
P
D
I
OUT
T
stg
T
bias
Min
–0.5
–0.5
–0.5
–
–
–65
–65
Max
+4.6
V
DD
+ 0.5
V
DDQ
+ 0.5
1.8
50
+150
+135
Unit
V
V
V
W
mA
°
C
°
C
Note: Stresses greater than those listed under
Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress rating only and functional oper-
ation of the device at these or any other conditions outside those indicated in the operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions may affect reliability.
3/4/02; v.1.4
Alliance Semiconductor
P. 3 of 11
AS7C33128PFS16A
AS7C33128PFS18A
®
Synchronous truth table
CE0
H
L
L
L
L
L
L
L
L
X
X
X
X
H
H
H
H
L
X
H
X
H
CE1
X
L
L
X
X
H
H
H
H
X
X
X
X
X
X
X
X
H
X
X
X
X
CE2
X
X
X
H
H
L
L
L
L
X
X
X
X
X
X
X
X
L
X
X
X
X
ADSP
X
L
H
L
H
L
L
H
H
H
H
H
H
X
X
X
X
H
H
X
H
X
ADSC
L
X
L
X
L
X
X
L
L
H
H
H
H
H
H
H
H
L
H
H
H
H
ADV
X
X
X
X
X
X
X
X
X
L
L
H
H
L
L
H
H
X
L
L
H
H
WEn
1
OE
X
X
X
X
X
L
H
L
H
L
H
L
H
L
H
L
H
X
X
X
X
X
Address accessed
NA
NA
NA
NA
NA
External
External
External
External
Next
Next
Current
Current
Next
Next
Current
Current
External
Next
Next
Current
Current
CLK
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
Operation
Deselect
Deselect
Deselect
Deselect
Deselect
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
DQ
Hi
−
Z
Hi
−
Z
Hi
−
Z
Hi
−
Z
Hi
−
Z
Hi
−
Z
2
Hi
−
Z
Hi
−
Z
2
Hi
−
Z
Q
Hi
−
Z
Q
Hi
−
Z
Q
Hi
−
Z
Q
Hi
−
Z
D
3
D
D
D
D
X
X
X
X
X
X
X
F
F
F
F
F
F
F
F
F
F
T
T
T
T
T
Key: X = Don’t Care, L = Low, H = High.
1
See “Write enable truth table” on page 2 for more information.
2Q in flow through mode
3
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
Supply voltage
3.3V I/O supply voltage
2.5V I/O supply voltage
Address and
control pins
I/O pins
Ambient operating temperature
Symbol
V
DD
V
SS
V
DDQ
V
SSQ
V
DDQ
V
SSQ
V
IH
V
IL
V
IH
V
IL
T
A
Min
3.135
0.0
3.135
0.0
2.35
0.0
2.0
–0.5
2
2.0
–0.5
2
0
Nominal
3.3
0.0
3.3
0.0
2.5
0.0
–
–
–
–
–
Max
3.6
0.0
3.6
0.0
2.9
0.0
V
DD
+ 0.3
0.8
V
DDQ
+ 0.3
0.8
70
Unit
V
V
V
V
V
°
C
Input voltages
1
1 Input voltage ranges apply to 3.3V I/O operation. For 2.5V I/O operation, contact factory for input specifications.
2 V
IL
min. = –2.0V for pulse width less than 0.2 × t
RC
.
3/4/02; v.1.4
Alliance Semiconductor
P. 4 of 11
AS7C33128PFS16A
AS7C33128PFS18A
®
TQFP thermal resistance
Description
Thermal resistance
(junction to ambient)
1
Thermal resistance
(junction to top of case)
1
1 This parameter is sampled.
Conditions
Test conditions follow standard test methods and
procedures for measuring thermal impedance,
per EIA/JESD51
Symbol
θ
JA
θ
JC
Typical
46
2.8
Units
°
C/W
°
C/W
DC electrical characteristics
–200
Parameter
Input leakage
current
1
Output leakage
current
Operating
power supply
current
Symbol
|I
LI
|
|I
LO
|
I
CC
2
–183
–166
–133
–100
Test conditions
V
DD
= Max, V
IN
= GND to
V
DD
OE
≥
V
IH
, V
DD
= Max,
V
OUT
= GND to V
DD
CE0 = V
IL
, CE1 = V
IH
, CE2
= V
IL
,
f = f
Max
, I
OUT
= 0 mA
Deselected, f = f
Max
, ZZ
≤
V
IL
Deselected, f = 0, ZZ
≤
0.2V
all V
IN
≤
0.2V or
≥
V
DD
–
0.2V
Deselected, f = f
Max
, ZZ
≥
V
DD
– 0.2V
All V
IN
≤
V
IL
or
≥
V
IH
I
OL
= 8 mA, V
DDQ
= 3.465V
I
OH
= –4 mA, V
DDQ
=
3.135V
Min Max Min Max Min Max Min Max Min Max Unit
–
–
–
–
–
2
2
570
160
30
–
–
–
–
–
2
2
540
140
30
–
–
–
–
–
2
2
475
130
30
–
–
–
–
–
2
2
425
100
30
–
–
–
–
–
2
2
325
90
30
µA
µA
mA
I
SB
Standby power
supply current
I
SB1
mA
I
SB2
V
OL
Output voltage
V
OH
–
–
2.4
30
0.4
–
–
–
2.4
30
0.4
–
–
–
2.4
30
0.4
–
–
–
2.4
30
0.4
–
–
–
2.4
30
0.4
–
V
1 LBO pin has an internal pull-up and input leakage = ±10
µa.
2 I
CC
give with no output loading. I
CC
increases with faster cycle times and greater output loading.
DC electrical characteristics for 2.5V I/O operation
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