PRELIMINARY
CY7C1012AV33
512K x 24 Static RAM
power-down feature that significantly reduces power
consumption when deselected.
Features
• High speed
Writing the data bytes into the SRAM is accomplished when
the chip select controlling that byte is LOW and the write
enable input (WE) input is LOW. Data on the respective
input/output (I/O) pins is then written into the location specified
on the address pins (A0–A16). Asserting all of the chip selects
LOW and write enable LOW will write all 24 bits of data into the
SRAM. Output enable (OE) is ignored while in WRITE mode.
— tAA = 10 ns
• Low active power
— 180 mW (max.)
• Operating voltages of 3.3 +/- 0.3V
• 2.0V data retention
• Automatic power-down when deselected
• TTL-compatible inputs and outputs
• Easy memory expansion with CE1, CE2 and CE3
features
Data bytes can also be individually read from the device.
Reading a byte is accomplished when the chip select
controlling that byte is LOW and write enable (WE) HIGH while
output enable (OE) remains LOW. Under these conditions, the
contents of the memory location specified on the address pins
will appear on the specified data input/output (I/O) pins.
Asserting all the chip selects LOW will read all 24 bits of data
from the SRAM.
Functional Description
The CY7C1012AV33 is a high-performance CMOS static RAM
organized as 512K words by 24 bits. Each data byte is
separately controlled by the individual chip selects (CE0, CE1,
CE2). CE0 controls the data on the I/O0–I/O7, while CE1
controls the data on I/O8–I/O15, and CE2 controls the data on
the data pins I/O16–I/O23. This device has an automatic
The 24 I/O pins (I/O0–I/O23) are placed in a high-impedance
state when all the chip selects are HIGH or when the output
enable (OE) is HIGH during a READ mode. For further details,
refer to the truth table of this datasheet.
The CY7C1012AV33 is available in a standard 119-ball BGA.
Functional Block Diagram
INPUT BUFFER
A
0
A
1
A
2
I/O –I/O
0
7
A
3
4
512K x 24
ARRAY
A
I/O –I/O
8
15
A
5
6
4096 x 4096
A
I/O –I/O
16
23
A
7
A
8
A
9
CE , CE , CE
3
1
2
COLUMN
DECODER
WE
CONTROL LOGIC
OE
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose
•
CA 95134
•
408-943-2600
Document #: 38-05254 Rev. **
Revised March 6, 2002