S1016C1C
WCFS1016C1C
64K x 16 Static RAM
Features
• High speed
— t
AA
= 12, 15 ns
• CMOS for optimum speed/power
• Automatic power-down when deselected
• Independent control of upper and lower bits
• Available in 400-mil SOJ
through A
15
). If Byte High Enable (BHE) is LOW, then data
from I/O pins (I/O
9
through I/O
16
) is written into the location
specified on the address pins (A
0
through A
15
).
Reading from the device is accomplished by taking Chip En-
able (CE) and Output Enable (OE) LOW while forcing the Write
Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW, then
data from the memory location specified by the address pins
will appear on I/O
1
to I/O
8
. If Byte High Enable (BHE) is LOW,
then data from memory will appear on I/O
9
to I/O
16
. See the
truth table at the back of this data sheet for a complete descrip-
tion of read and write modes.
The input/output pins (I/O
1
through I/O
16
) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), the BHE and BLE
are disabled (BHE, BLE HIGH), or during a write operation (CE
LOW, and WE LOW).
The WCFS1016C1C is available in 400-mil-wide SOJ packag-
es.
Functional Description
The WCFS1016C1C is a high-performance CMOS static RAM
organized as 65,536 words by 16 bits. This device has an au-
tomatic power-down feature that significantly reduces power
consumption when deselected.
Writing to the device is accomplished by taking Chip Enable
(CE) and Write Enable (WE) inputs LOW. If Byte Low Enable
(BLE) is LOW, then data from I/O pins (I/O
1
through I/O
8
), is
written into the location specified on the address pins (A
0
Logic Block Diagram
DATA IN DRIVERS
Pin Configuration
SOJ
Top View
A
4
A
3
A
2
A
1
A
0
CE
I/O
1
I/O
2
I/O
3
I/O
4
V
CC
V
SS
I/O
5
I/O
6
I/O
7
I/O
8
WE
A
15
A
14
A
13
A
12
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
64K x 16
RAM Array
512 X 2048
I/O
1
–I/O
8
I/O
9
–I/O
16
COLUMN DECODER
BHE
WE
CE
OE
BLE
A
5
A
6
A
7
OE
BHE
BLE
I/O
16
I/O
15
I/O
14
I/O
13
V
SS
V
CC
I/O
12
I/O
11
I/O
10
I/O
9
NC
A
8
A
9
A
10
A
11
NC
ROW DECODER
Selection Guide
WCFS1016C1C 12ns
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum CMOS Standby Current (mA)
12
140
10
WCFS1016C1C 15ns
15
130
10
A
8
A
9
A
10
A
11
A
12
A
13
A
14
A
15
SENSE AMPS
Revised February 14, 2002
WEIDA [ WEIDA SEMICONDUCTOR, INC. ]
