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IC BLOCK DIAGRAMS AND TERMINAL DESCRIPTIONS -43
Q3461, Q3471, Q3561: IC42S16100 (16-Mbit Synchronous Dynamic RAM)
BLOCK DIAGRAM
CLK
CKE
COMMAND
CS
DECODER
RAS
&
CAS
CLOCK
WE
GENERATOR
A11
1
A10
A9
REFRESH
CONTROLLER
A8
A7
A6
REFRESH
A5
COUNTER
A4
A3
A2
A1
A0
ROW
ADDRESS
LATCH
11
PIN CONFIGURATION
ROW
ADDRESS
BUFFER
MODE
11
REGISTER
11
8
SELF
REFRESH
CONTROLLER
ROW
ADDRESS
BUFFER
11
VCC
1
50
GND
I/O0
2
49
I/O15
I/O1
3
48
I/O14
GNDQ
4
47
GNDQ
I/O2
5
46
I/O13
I/O3
6
45
I/O12
VCCQ
7
44
VCCQ
I/O4
8
43
I/O11
42
I/O5
9
I/O10
GNDQ
10
41
GNDQ
I/O6
11
40
I/O9
I/O7
12
39
I/O8
VCCQ
13
38
VCCQ
LDQM
14
37
NC
WE
15
36
UDQM
CAS
16
35
CLK
RAS
17
34
CKE
CS
18
33
NC
A11
19
32
A9
A10
20
31
A8
A0
21
30
A7
A1
22
29
A6
A2
23
28
A5
A3
24
27
A4
VCC
25
26
GND
MEMORY CELL
ARRAY
2048
BANK 0
11
SENSE AMP I/O GATE
256
COLUMN DECODER
8
256
SENSE AMP I/O GATE
MEMORY CELL
ARRAY
2048
BANK 1
11
TX-SR875
DQM
DATA IN
BUFFER
16
16
I/O 0-15
DATA OUT
BUFFER
16
16
Vcc/VccQ
GND/GNDQ
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