4-Mbit (512K x 8) MoBL® Static RAM
CY62148DV30
Cypress Semiconductor Corporation
•
198 Champion Court
•
San Jose
, CA 95134-1709
•
408-943-2600
Document #: 38-05341 Rev. *D
Revised January 25, 2007
Features
• Temperature Ranges
— Industrial: –40°C to 85°C
— Automotive-A: –40°C to 85°C
• Very high speed: 55 ns
— Wide voltage range: 2.20V – 3.60V
• Pin-compatible with CY62148CV25, CY62148CV30 and
CY62148CV33
• Ultra low active power
— Typical active current: 1.5 mA @ f = 1 MHz
— Typical active current: 8 mA @ f = fmax(55-ns speed)
• Ultra low standby power
• Easy memory expansion with CE, and OE features
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Available in Pb-free and non Pb-free 36-ball VFBGA,
Pb-free 32-pin TSOPII and 32-pin SOIC packages
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 (IO0 through IO7)
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 IO pins (IO0
through IO7) 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 IO pins.
Logic Block Diagram
A1
COLUMN
DECODER
Data in Drivers
POWER
DOWN
WE
OE
IO 0
IO 1
IO 2
IO 3
512K x 8
ARRAY
IO 7
IO 6
IO 5
IO 4
A0
CE
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
Note:
1. For best practice recommendations, refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
