
1M x 4 Static RAM
CY7C1046CV33
Cypress Semiconductor Corporation
Document #: 38-05003 Rev. *A
3901 North First Street
San Jose
CA 95134
Revised September 13, 2002
408-943-2600
Features
High speed
—t
AA
= 10ns
Low active power for 10 ns speed
—324 mW (max.)
2.0V data retention
Automatic power-down when deselected
TTL-compatible inputs and outputs
Easy memory expansion with CE and OE features
Functional Description
[1]
The CY7C1046CV33 is a high-performance CMOS static
RAM organized as 1,048,576 words by 4 bits. Easy memory
expansion is provided by an active LOW Chip Enable (CE), an
active LOW Output Enable (OE), and three-state drivers.
Logic Block Diagram
Writing to the device is accomplished by taking Chip Enable
(CE) and Write Enable (WE) inputs LOW. Data on the four I/O
pins (I/O
0
through I/O
3
) is then written into the location
specified on the address pins (A
0
through A
19
).
Reading from the device is accomplished by taking Chip
Enable (CE) and Output Enable (OE) LOW while forcing Write
Enable (WE) HIGH. Under these conditions, the contents of
the memory location specified by the address pins will appear
on the I/O pins.
The four input/output pins (I/O
0
through I/O
3
) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a Write
operation (CE LOW, and WE LOW).
The CY7C1046CV33 is available in a standard 400-mil-wide
32-pin SOJ package with center power and ground (revolu-
tionary) pinout.
1
A
1
A
Pin Configuration
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
A
10
COLUMN
DECODER
R
S
INPUT BUFFER
POWER
DOWN
WE
OE
I/O
0
I/O
1
1M x 4
ARRAY
I/O
3
I/O
2
A
0
A
1
A
1
A
1
CE
A
1
A
1
1
2
3
4
5
6
7
8
9
10
11
12
13
21
20
22
25
24
23
28
27
26
Top View
SOJ
29
32
31
30
14
15
19
18
GND
I/O
1
A
1
A
2
A
3
A
4
CE
A
5
A
6
A
7
A
8
A
9
WE
V
CC
I/O
2
A
18
A
17
A
16
A
15
OE
I/O
3
A
12
A
11
A
14
A
13
A
0
I/O
0
V
CC
A
1
16
17
GND
A
10
NC
A
19
A
1
Selection Guide
-8
[2]
8
100
10
-10
10
90
10
-12
12
85
10
-15
15
80
10
Unit
ns
mA
mA
Maximum Access Time
Maximum Operating Current
Maximum CMOS Standby Current
Notes:
1.
For guidelines on SRAM system design, please refer to the
‘
System Design Guidelines
’
Cypress application note, available on the internet at www.cypress.com.
2.
Shaded areas contain advance information.