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IC BLOCK DIAGRAM -2/3
IC, AS4LC256K16EO-35
27
OE
WE
13
28
UCAS
29
LCAS
14
RAS
V
1
CC
V
6
CC
20
V
CC
21
V
SS
V
35
SS
V
40
SS
A
16
0
A
19
3
A
4
22
26
A
8
IC, KA78R12
Vin
Vdis
RAS CLOCK
CAS CLOCK
GENERATOR
GENERATOR
REFRESH
COUNTER
9
ADDRESS BUFFERS
AND PREDECODERS
X
0
1
THERMAL SHUTDOWN
BANDGAP REFERENCE
HIGH / LOW
OUTPUT
ON / OFF
4
-
+
1.4V
Published in Heiloo, Holland.
WE CLOCK
GENERATOR
Data I/O BUS
COLUMN DECODERS
SENSE AMPLIFIERS
Y
- Y
0
8
512 16
ROW
MEMORY
DECODERS
- x
8
512
OVERVOLTAGE
PROTECTION
-
+
SOA PROTECTION
SHORT-CIRCUIT
SHORTCIRCUIT
PROTECTION
3
GND
-54-
OE CLOCK
GENERATOR
I/O
BUFFER
ARRAY
2
Vo
1/3/16
11
N.C
12
N.C
15
N.C
30
N.C
2
I/O1
3
I/O2
4
I/O3
5
I/O4
7
I/O5
8
I/O6
9
I/O7
10
I/O8
31
I/O9
32
I/O10
33
I/O11
34
I/O12
36
I/O13
37
I/O14
38
I/O15
39
I/O16
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