S0808C1E
WCFS0808C1E
32K x 8 Static RAM
Features
• High speed
— 12 ns
• Fast t
DOE
• CMOS for optimum speed/power
• Easy memory expansion with CE and OE features
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
an automatic power-down feature, reducing the power con-
sumption by 81% when deselected. The WCFS0808C1E is in
the standard SOJ package.
An active LOW Write Enable signal (WE) controls the writ-
ing/reading operation of the memory. When CE and WE inputs
are both LOW, data on the eight data input/output pins (I/O
0
through I/O
7
) is written into the memory location addressed by
the address present on the address pins (A
0
through A
14
).
Reading the device is accomplished by selecting the device
and enabling the outputs, CE and OE active LOW, while WE
remains inactive or HIGH. Under these conditions, the con-
tents of the location addressed by the information on address
pins are present on the eight data input/output pins.
The input/output pins remain in a high-impedance state unless
the chip is selected, outputs are enabled, and Write Enable
(WE) is HIGH. A die coat is used to improve alpha immunity.
Functional Description
The WCFS0808C1E is a high-performance CMOS static RAM
organized as 32K words by 8 bits. Easy memory expansion is
provided by an active LOW Chip Enable (CE) and active LOW
Output Enable (OE) and three-state drivers. This device has
Logic Block Diagram
Pin Configurations
SOJ
Top View
I/O
0
INPUT BUFFER
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
CE
WE
OE
I/O
1
ROW DECODER
I/O
2
SENSE AMPS
1024 x 32 x 8
ARRAY
I/O
3
I/O
4
I/O
5
COLUMN
DECODER
POWER
DOWN
I/O
6
I/O
7
A
5
A
6
A
7
A
8
A
9
A
10
A
11
A
12
A
13
A
14
I/O
0
I/O
1
I/O
2
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
V
CC
WE
A
4
A
3
A
2
A
1
OE
A
0
CE
I/O
7
I/O
6
I/O
5
I/O
4
I/O
3
A
10
A
12
A
13
A
11
Selection Guide
Maximum Access Time (ns)
Maximum Operating Current (mA)
Maximum CMOS Standby Current (mA)
WCFS0808C1E 12ns
12
160
10
WCFS0808C1E 15ns
15
155
10
A
14
Revised February 18, 2002
WEIDA [ WEIDA SEMICONDUCTOR, INC. ]
