Typical DC and AC characteristics
Normalized supply current ICC, ISB vs. supply voltage VCC
|
1.4 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1.2 |
|
|
|
|
|
|
|
SB |
|
|
ICC |
|
|
|
||
1.0 |
|
|
|
|
|
|||
I |
|
|
|
|
|
|
|
|
, |
|
|
|
|
|
|
|
|
CC |
0.8 |
|
|
|
|
|
|
|
I |
|
|
|
|
|
|
|
|
Normalized |
0.6 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.4 |
|
|
ISB |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
0.0 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
MIN |
|
NOMINAL |
MAX |
||||
Supply voltage (V)
AS7C256
AS7C3256
®
Normalized supply current ICC, ISB |
Normalized supply current ISB1 |
vs. ambient temperature Ta |
vs. ambient temperature Ta |
1.4
I |
1.2 |
|
ICC |
|
|
scale) |
625 |
VCC = VCC(NOMINAL) |
|
||
1.0 |
|
|
|
25 |
|
||||||
SB |
|
|
|
|
|
(log |
|
|
|
|
|
I |
|
|
|
|
|
|
|
|
|
|
|
, |
|
|
|
|
|
|
|
|
|
|
|
CC |
0.8 |
|
|
|
|
|
5 |
|
|
|
|
Normalized |
|
|
|
|
SB1 |
|
|
|
|
||
0.2 |
|
|
|
|
0.04 |
|
|
|
|
||
|
|
|
|
NormalizedI |
|
|
|
|
|||
|
0.6 |
|
ISB |
|
|
|
1 |
|
|
|
|
|
0.4 |
|
|
|
|
0.2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
0.0 |
|
|
|
|
|
|
|
|
|
|
|
–55 |
–10 |
35 |
80 |
125 |
|
-55 |
-10 |
35 |
80 |
125 |
|
|
Ambient temperature (°C) |
|
|
|
Ambient temperature (°C) |
|
||||
Normalized access time tAA |
Normalized access time tAA |
vs. supply voltage VCC |
vs. ambient temperature Ta |
|
1.5 |
|
|
|
1.5 |
|
|
|
|
1.4 |
time |
1.4 |
|
|
time |
1.4 |
|
|
|
|
1.2 |
1.3 |
Ta = 25°C |
|
1.3 |
VCC = VCC(NOMINAL) |
|
1.0 |
||||
|
|
|
|
|
CC |
|||||
|
|
|
|
|
|
|
|
|||
Normalizedaccess |
1.2 |
|
|
Normalizedaccess |
1.2 |
|
|
|
Normalized I |
0.8 |
1.1 |
|
|
1.1 |
|
|
|
0.6 |
|||
1.0 |
|
|
1.0 |
|
|
|
0.4 |
|||
0.9 |
|
|
0.9 |
|
|
|
0.2 |
|||
|
|
|
|
|
|
|
|
|||
|
0.8 |
|
|
|
0.8 |
|
|
|
|
0.0 |
|
MIN |
NOMINAL |
MAX |
|
–55 |
–10 |
35 |
80 |
125 |
|
Normalized supply current ICC vs. cycle frequency 1/tRC, 1/tWC
|
VCC = VCC(NOMINAL) |
|
||
|
Ta = 25°C |
|
|
|
0 |
25 |
50 |
75 |
100 |
Supply voltage (V) |
Ambient temperature (°C) |
Cycle frequency (MHz) |
|
Output source current IOH |
|
Output sink current IOL |
|
|
Typical access time change ∆ |
tAA |
||
|
vs. output voltage VOH |
|
vs. output voltage VOL |
|
35 |
vs. output capacitive loading |
|||
|
140 |
|
140 |
|
|
|
|
|
|
sourceOutputcurrent (mA) |
120 |
sinkOutputcurrent (mA) |
120 |
|
30 |
|
|
|
|
VCC = VCC(NOMINAL)PL |
VCC = VCC(NOMINAL) |
(ns) |
|
VCC = VCC(NOMINAL) |
|
||||
100 |
100 |
25 |
|
|
|
|
|||
Changein t |
|
|
|
|
|||||
20 |
20 |
5 |
|
|
|
|
|||
|
Ta = 25°C |
|
Ta = 25°C |
AA |
20 |
|
|
|
|
|
80 |
|
80 |
|
|
|
|
||
|
60 |
|
60 |
|
15 |
|
|
|
|
|
40 |
|
40 |
|
10 |
|
|
|
|
|
0 |
|
0 |
|
0 |
|
|
|
|
|
0 |
VCC |
0 |
VCC |
0 |
250 |
500 |
750 |
1000 |
Output voltage (V) |
Output voltage (V) |
Capacitance (pF) |
1/10/2001 |
Alliance Semiconductor |
P. 7 of 9 |
|
|
|
AS7C256
AS7C3256
®
Package diagrams
28-pin PDIP
Min Max
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
A |
|
D |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
S |
|
|
|
|
|
|
B |
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
E1 |
E |
L |
α |
c |
|
|
|
e |
b |
A1 |
eA |
Pin 1 |
|
Seating |
|
||
|
Plane |
|
|
|
A |
- |
0.175 |
A1 |
0.010 |
- |
B |
0.058 |
0.064 |
b |
0.016 |
0.022 |
c |
0.008 |
0.014 |
D |
- |
1.400 |
E |
0.295 |
0.320 |
E1 |
0.278 |
0.298 |
e |
0.100 BSC |
|
eA |
0.330 |
0.370 |
L |
0.120 |
0.140 |
α |
0° |
15° |
S |
- |
0.055 |
e |
D |
B |
A
E1 |
E2 |
A1 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
b |
Seating |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Plane |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Pin 1 |
|
|
|
|
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
c |
|
|||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
A2 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
E
|
|
|
|
|
|
|
|
|
|
|
|
|
|
b |
e |
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||||||||||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
c |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
L |
|
|
|
|
|
|
|
|
|
|
|
A2 |
|
|
A |
|
|
A1 |
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
pin 1(22) |
pin 8(21) |
|
|
|
|
|
|
|
|
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
D Hd |
|
|
|
|
|
α |
|
|
|
|
|
|
|
|
|||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
pin 1(7) |
pin 5(8) |
|
|
|
|
|
|
|
|
||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
28-pin |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Note: This part is compatible with both pin numbering |
|
|
|
|
|
|
|
|
|||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
E |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
conventions used by various manufacturers. |
|
|
|
|
|
|
|
|
|||||||||||||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||||||||||||||
|
28-pin SOJ |
|
|
Min |
Max |
A |
- |
0.140 |
A1 |
0.025 |
- |
A2 |
0.095 |
0.105 |
B |
0.028 TYP |
|
b |
0.018 TYP |
|
c |
0.010 TYP |
|
D |
- |
0.730 |
E |
0.245 |
0.285 |
E1 |
0.295 |
0.305 |
E2 |
0.327 |
0.347 |
e |
0.050 BSC |
|
|
28-pin |
|
|
8×13.4 |
|
|
Min |
Max |
A |
– |
1.20 |
A1 |
0.10 |
0.20 |
A2 |
0.95 |
1.05 |
b |
0.15 |
0.25 |
c |
0.10 |
0.20 |
D |
11.60 |
11.80 |
e |
0.55 nominal |
|
1/10/2001 |
Alliance Semiconductor |
P. 8 of 9 |
|
|
|