049V33
CY7C1049V33
512K x 8 Static RAM
Features
• High speed
— tAA = 15 ns
• Low active power
— 504 mW (max.)
• Low CMOS standby power (Commercial L version)
— 1.8 mW (max.)
• 2.0V Data Retention (660 µW at 2.0V retention)
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE and OE features
Functional Description
The CY7C1049V33 is a high-performance CMOS Static RAM
organized as 524,288 words by 8 bits. Easy memory expan-
sion is provided by an active LOW Chip Enable (CE), an active
LOW Output Enable (OE), and three-state drivers. Writing to
the device is accomplished by taking Chip Enable (CE) and
Write Enable (WE) inputs LOW. Data on the eight I/O pins
(I/O0 through I/O7) is then written into the location specified on
the address pins (A0 through A18).
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 eight input/output pins (I/O0 through I/O7) 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 CY7C1049V33 is available in a standard 400-mil-wide
36-pin SOJ package with center power and ground (revolutionary) pinout.
Logic Block Diagram
Pin Configuration
SOJ
Top View
A0
A1
A2
A3
A4
CE
I/O0
I/O1
VCC
GND
I/O2
I/O3
WE
A5
A6
A7
A8
A9
I/O0
INPUT BUFFER
I/O1
ROW DECODER
I/O2
SENSE AMPS
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
512K x 8
ARRAY
I/O3
I/O4
I/O5
I/O6
POWER
DOWN
COLUMN
DECODER
CE
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
19
NC
A18
A17
A16
A15
OE
I/O7
I/O6
GND
VCC
I/O5
I/O4
A14
A13
A12
A11
A10
NC
I/O7
A 11
A 12
A 13
A14
A15
A16
A17
A18
WE
OE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1049V33–2
1049V33–1
Selection Guide
1049V33-12
Maximum CMOS Standby
Current (mA)
Com’l/Ind’l
Com’l
L
1049V33-17
1049V33-20
1049V33-25
15
17
20
25
150
Maximum Operating Current (mA)
1049V33-15
12
Maximum Access Time (ns)
140
130
120
110
8
8
8
8
8
0.5
0.5
0.5
0.5
0.5
Shaded areas contain preliminary information.
Cypress Semiconductor Corporation
Document #: 38-05067 Rev. **
•
3901 North First Street
•
San Jose
•
CA 95134
• 408-943-2600
Revised July 9, 2001
