CY62158EV30_11 Datasheet, PDF (1/16 Pages) Cypress Semiconductor – 8-Mbit (1024 K x 8) Static RAM Automatic power down when deselected

CY62158EV30 MoBL^®
8-Mbit (1024 K × 8) Static RAM
8-Mbit (1024 K × 8) Static RAM
Features
■ Very high speed: 45 ns
❐ Wide voltage range: 2.20 V–3.60 V
■ Pin compatible with CY62158DV30
■ Ultra low standby power
❐ Typical standby current: 2 A
❐ Maximum standby current: 8 A
■ Ultra low active power
❐ Typical active current: 1.8 mA at f = 1 MHz
■ Easy memory expansion with CE₁, CE₂, and OE features
■ Automatic power down when deselected
■ CMOS for optimum speed/power
■ Offered in Pb-free 48-ball VFBGA and 44-pin TSOP II
packages
Functional Description
The CY62158EV30 is a high performance CMOS static RAM
organized as 1024K words by 8 bits. This device features
advanced circuit design to provide ultra low active current. This
is ideal for providing More Battery Life™ (MoBL^) in portable
applications such as cellular telephones. The device also has an
automatic power down feature that significantly reduces power
consumption. Placing the device into standby mode reduces
power consumption significantly when deselected (CE₁ HIGH or
CE₂ LOW). The eight input and output pins (I/O₀ through I/O₇)
are placed in a high impedance state when the device is
deselected (CE₁ HIGH or CE₂ LOW), the outputs are disabled
(OE HIGH), or a write operation is in progress (CE₁ LOW and
CE₂ HIGH and WE LOW).
To write to the device, take Chip Enables (CE₁ LOW and CE₂
HIGH) and Write Enable (WE) input 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 A₁₉).
To read from the device, take Chip Enables (CE₁ LOW and CE₂
HIGH) and OE LOW while forcing the WE HIGH. Under these
conditions, the contents of the memory location specified by the
address pins appear on the I/O pins. See Truth Table on page 10
for a complete description of read and write modes.
Logic Block Diagram
I/O₀
I/O₁
I/O₂
I/O₃
I/O₄
I/O₅
I/O₆
I/O₇
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 38-05578 Rev. *G
• San Jose, CA 95134-1709 • 408-943-2600
Revised May 30, 2011
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