CY62158CV30 Datasheet, PDF (1/12 Pages) Cypress Semiconductor – 1024K x 8 MoBL Static RAM

CY62158CV25/30/33
MoBL™
Features
• High Speed
— 55 ns and 70 ns availability
• Voltage range:
— CY62158CV25: 2.2V–2.7V
— CY62158CV30: 2.7V–3.3V
— CY62158CV33: 3.0V–3.6V
• Ultra low active power
— Typical active current: 1.5 mA @ f = 1 MHz
— Typical active current: 5.5 mA @ f = f_max(70 ns speed)
• Low standby power
• Easy memory expansion with CE₁, CE₂ and OE features
• Automatic power-down when deselected
• CMOS for optimum speed/power
Functional Description
The CY62158CV25/30/33 are high-performance CMOS static
RAMs organized as 1024K words by 8 bits. This device fea-
tures advanced circuit design to provide ultra-low active cur-
rent. This is ideal for providing More Battery Life™ (MoBL™)
Logic Block Diagram
1024K x 8 MoBL Static RAM
in portable applications such as cellular telephones. The de-
vice also has an automatic power-down feature that signifi-
cantly reduces power consumption by 80% when addresses
are not toggling. The device can be put into standby mode
reducing power consumption by more than 99% when dese-
lected (CE₁ HIGH or CE₂ LOW).
Writing to the device is accomplished by taking Chip Enable 1
(CE₁) and Write Enable (WE) inputs LOW and Chip Enable 2
(CE₂) HIGH. 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).
Reading from the device is accomplished by taking Chip En-
able 1 (CE₁) and Output Enable (OE) LOW and Chip Enable
2 (CE₂) HIGH while forcing Write Enable (WE) HIGH. Under
these conditions, the contents of the memory location speci-
fied by the address pins will appear on the I/O pins.
The eight input/output pins (I/O₀ through I/O₇) are placed in a
high-impedance state when the device is deselected (CE₁
LOW and CE₂ HIGH), the outputs are disabled (OE HIGH), or
during a write operation (CE₁ LOW and CE₂ HIGH and WE
LOW).
The CY62158CV25/30/33 are available in a 48-ball FBGA
package.
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Data in Drivers
1024K x 8
ARRAY
CE₁
CE₂
WE
OE
COLUMN
DECODER
POWER
DOWN
I/O₀
I/O₁
I/O₂
I/O₃
I/O₄
I/O₅
I/O₆
I/O₇
Cypress Semiconductor Corporation • 3901 North First Street • San Jose • CA 95134 • 408-943-2600
Document #: 38-05019 Rev. *C
Revised April 24, 2002