¡ Semiconductor
PIN CONFIGURATION (TOP VIEW)
W5/IO5
W7/IO7
SE
SIO6
SIO8
1
3
5
7
9
2
4
6
8
W6/IO6
W8/IO8
SIO5
SIO7
SC 11
SIO2 13
SIO4 15
W1/IO1 17
W3/IO3 19
W4/IO4 21
WB/WE
23
A8 25
V
SS2
27
A5 29
NC 31
A7 33
A2 35
A0 37
CAS
39
10 V
SS1
12 SIO1
14 SIO3
16
DT/OE
18 W2/IO2
20 NC
22 V
CC1
24
RAS
26 A6
28 NC
30 A4
32 V
CC2
34 A3
36 A1
38 NC
40 NC
SC 1
SIO1 2
SIO2 3
SIO3 4
SIO4 5
DT/OE
6
W1/IO1 7
W2/IO2 8
W3/IO3 9
W4/IO4 10
V
CC1
11
WB/WE
12
NC 13
RAS
14
NC 15
A8 16
A6 17
A5 18
A4 19
V
CC2
20
40-Pin Plastic SOJ
MSM518121A
40 V
SS1
39 SIO8
38 SIO7
37 SIO6
36 SIO5
35
SE
34 W8/IO8
33 W7/IO7
32 W6/IO6
31 W5/IO5
30 V
SS2
29 NC
28 NC
27
CAS
26 NC
25 A0
24 A1
23 A2
22 A3
21 A7
40-Pin Plastic ZIP
Pin Name
A0 - A8
RAS
CAS
DT
/
OE
WB
/
WE
W1/IO1 - W8/IO8
SC
SE
SIO1 - SIO8
V
CC
/ V
SS
NC
Function
Address Input
Row Address Strobe
Column Address Strobe
Data Transfer / Output Enable
Write per Bit / Write Enable
Write Mask / Data IN, OUT
Serial Clock
Serial Enable
Serial Input / Output
Power Supply (5 V) / Ground (0 V)
No Connection
Note:
The same power supply voltage must be provided to every V
CC
pin, and the same GND
voltage level must be provided to every V
SS
pin.
2/33
OKI [ OKI ELECTRONIC COMPONETS ]
