CY62148DV30_11 Datasheet, PDF (1/13 Pages) Cypress Semiconductor – 4-Mbit (512K x 8) MoBL Static RAM

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CY62148DV30
4-Mbit (512K x 8) MoBL^ Static RAM
Features
■ Temperature Ranges
❐ Industrial: –40 °C to 85 °C
■ Very high speed: 55 ns
❐ Wide voltage range: 2.20 V – 3.60 V
■ Pin-compatible with CY62148CV25, CY62148CV30 and
CY62148CV33
■ Ultra low active power
❐ Typical active current: 1.5 mA at f = 1 MHz
❐ Typical active current: 8 mA at f = f_max(55-ns speed)
■ Ultra low standby power
■ Easy memory expansion with CE, and OE features
■ Automatic power-down when deselected
■ Complementary metal oxide semiconductor (CMOS) for
optimum speed/power
■ Available in Pb-free 32-pin Small-outline integrated circuit
(SOIC package)
Logic Block Diagram
Functional Description^[1]
The CY62148DV30 is a high-performance CMOS static RAM
organized as 512K 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. The device can be put into standby mode reducing
power consumption when deselected (CE HIGH).The eight input
and output pins (I/O₀ through I/O₇) are placed in a
high-impedance state when:
■ Deselected (CE HIGH)
■ Outputs are disabled (OE HIGH)
■ When the write operation is active(CE LOW and WE LOW)
Write to the device 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).
Read from the device 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.
A^AAAAAAAAAAAA_{1112471035869210}
CE
WE
OE
Data in Drivers
512K x 8
ARRAY
COLUMN
DECODER
POWER
DOWN
I/O₀
I/O₁
I/O₂
I/O₃
I/O₄
I/O₅
I/O₆
I/O₇
Note
1. For best practice recommendations, refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
Cypress Semiconductor Corporation • 198 Champion Court
Document Number : 38-05341 Rev. *F
• San Jose, CA 95134-1709 • 408-943-2600
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