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Cypress Semiconductor CY7C1041DV33 仕様書
Features
■
Pin and function compatible with CY7C1041CV33
■
High speed
❐
t
= 10 ns
AA
■
Low active power
❐
I
= 90 mA at 10 ns (industrial)
CC
■
Low CMOS standby power
❐
I
= 10 mA
SB2
■
2.0V data retention
■
Automatic power down when deselected
■
TTL compatible inputs and outputs
■
Easy memory expansion with CE and OE features
■
Available in Pb-free 48-ball VFBGA, 44-pin (400-mil) molded
SOJ, and 44-pin TSOP II packages
Logic Block Diagram
Note
1. For guidelines on SRAM system design, refer to the "System Design Guidelines" Cypress application note, available at www.cypress.com.
Cypress Semiconductor Corporation
Document #: 38-05473 Rev. *E
INPUT BUFFER
A
0
A
1
A
2
A
3
A
256K × 16
4
A
5
A
6
A
7
A
8
COLUMN
DECODER
•
198 Champion Court
4 Mbit (256K x 16) Static RAM

Functional Description

[1]
The CY7C1041DV33
is a high performance CMOS Static RAM
organized as 256K words by 16 bits. To write to the device, take
Chip Enable (CE) and Write Enable (WE) inputs LOW. If Byte
LOW Enable (BLE) is LOW, then data from IO pins (IO
is written into the location specified on the address pins (A
A
). If Byte HIGH Enable (BHE) is LOW, then data from IO pins
17
(IO
to IO
) is written into the location specified on the address
8
15
pins (A
to A
).
0
17
To read from the device, take Chip Enable (CE) and Output
Enable (OE) LOW while forcing the Write Enable (WE) HIGH. If
BLE is LOW, then data from the memory location specified by
the address pins appears on IO
from memory appears on IO
page 9 for a complete description of read and write modes.
The input and output pins (IO
impedance state when the device is deselected (CE HIGH),
outputs are disabled (OE HIGH), BHE and BLE are disabled
(BHE, BLE HIGH), or during a write operation (CE LOW and WE
LOW).
The CY7C1041DV33 is available in a standard 44-pin 400-mil
wide SOJ and 44-pin TSOP II package with center power and
ground (revolutionary) pinout and a 48-ball fine-pitch ball grid
array (FBGA) package.
IO
–IO
0
7
IO
–IO
8
15
BHE
WE
CE
OE
BLE
,
•
San Jose
CA 95134-1709
CY7C1041DV33
to IO
0
to IO
. If BHE is LOW, then data
0
7
to IO
. See the
Truth Table
8
15
to IO
) are placed in a high
0
15
•
408-943-2600
Revised July 17, 2008
)
7
to
0
on
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