CY7C1041CV33_10 Datasheet, PDF (1/15 Pages) Cypress Semiconductor – 4-Mbit (256 K × 16) Static RAM

CY7C1041CV33
4-Mbit (256 K × 16) Static RAM
4-Mbit (256 K × 16) Static RAM
Features
■ Temperature ranges
❐ Commercial: 0 °C to 70°C
■ Pin and function compatible with CY7C1041BV33
■ High speed
❐ t_AA = 8 ns
■ Low active power
❐ 360 mW (max)
■ 2.0 V data retention
■ Automatic power down when deselected
■ TTL-compatible inputs and outputs
■ Easy memory expansion with CE and OE features
■ Available in Pb-free 44-pin TSOP II package
Logic Block Diagram
A₀
A₁
A₂
A₃
A₄
A₅
A₆
A₇
A₈
INPUT BUFFER
256K x 16
RAM Array
Functional Description
The CY7C1041CV33 is a high performance CMOS static RAM
organized as 262,144 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 I/O pins (/IO₀ through I/O₇), is written into the location
specified on the address pins (A₀ through A₁₇). If Byte High
Enable (BHE) is LOW, then data from IO pins (I/O₈ through I/O₁₅)
is written into the location specified on the address pins (A₀
through A₁₇).
To read from the device, take Chip Enable (CE) and Output
Enable (OE) LOW while forcing the Write Enable (WE) HIGH. If
Byte Low Enable (BLE) is LOW, then data from the memory
location specified by the address pins appear on I/O₀ to I/O₇. If
Byte High Enable (BHE) is LOW, then data from memory
appears on I/O₈ to I/O₁₅. For more information, see the Truth
Table on page 10 for a complete description of Read and Write
modes.
The input and output pins (I/O₀ through I/O₁₅) are placed in a
high impedance state when the device is deselected (CE HIGH),
the outputs are disabled (OE HIGH), the BHE and BLE are
disabled (BHE, BLE HIGH), or during a write operation (CE LOW
and WE LOW).
For best practice recommendations, refer to the Cypress
application note AN1064, SRAM System Guidelines.
I/O₀–I/O₇
I/O₈–I/O₁₅
COLUMN DECODER
BHE
WE
CE
OE
BLE
Cypress Semiconductor Corporation • 198 Champion Court
Document Number: 38-05134 Rev. *L
• San Jose, CA 95134-1709 • 408-943-2600
Revised March 4, 2011
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