S0808C1X
WCMS0808C1X
32Kx8 Static RAM
LOW output enable (OE) and three-state drivers. This device
has an automatic power-down feature, reducing the power
Features
• Low Voltage Range
consumption
by
99.9%
when
deselected.
The
WCMS0808C1X is in the standard 450-mil-wide (300-mil body
width) SOIC and packages.
— 4.5V–5.5V Operation
• Low active power
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/O0
through I/O7) is written into the memory location addressed by
the address present on the address pins (A0 through A14).
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.
— 275 mW (max.)
• Low standby power
— 28 µW (max.)
• Easy memory expansion with CE and OE features
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
• CMOS for optimum speed/power
Functional Description
The input/output pins remain in a high-impedance state unless
the chip is selected, outputs are enabled, and write enable
(WE) is HIGH.
The WCMS0808C1X is a high-performance CMOS static
RAM organized as 32K words by 8 bits. Easy memory expan-
sion is provided by an active LOW chip enable (CE) and active
Logic Block Diagram
Pin Configurations
Narrow SOIC
Top View
A
5
28
V
CC
1
27 WE
A
7
2
3
4
5
6
7
8
9
10
11
12
13
14
6
A
26
25
24
A
3
A
2
I/O
I/O
I/O
I/O
I/O
I/O
I/O
4
0
1
2
3
4
5
6
A
A
8
A
9
INPUTBUFFER
A
10
A
11
A
12
A
13
A
14
23
22
A
OE
A
A
A
8
1
10
9
A
21
20
19
18
17
0
A
7
CE
I/O
I/O
I/O
A
6
5
512x512
ARRAY
7
A
I/O
I/O
I/O
6
5
4
0
1
2
A
A
A
4
3
16 I/O
I/O
15
2
GND
3
CE
POWER
DOWN
WE
COLUMN
DECODER
I/O
21
20
A
CE
I/O
I/O
I/O
I/O
I/O
7
OE
1
A
2
22
23
24
0
OE
A
19
18
17
16
7
A
6
5
4
3
25
26
27
28
1
3
A
4
TSOP I
Top View
WE
15
14
13
V
CC
GND
I/O
A
5
(not to scale)
A
2
2
3
6
12
11
I/O
1
A7
A
8
I/O
4
5
0
10
9
A
13
A
14
9
10
11
A
A
A
6
7
8
A
12