CY62148DV30
4-Mb (512K x 8) MoBL Static RAM
Features
Functional Description[1]
• Very high speed: 55 ns
The CY62148DV30 is a high-performance CMOS static RAMs
organized as 512K words by 8 bits. This device features
advanced circuit design to provide ultra-low active current.
— Wide voltage range: 2.20V – 3.60V
• Pin-compatible with CY62148CV25, CY62148CV30 and
CY62148CV33
• Ultra low active power
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).
— 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
Writing to the device is accomplished 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).
• Packages offered: 36-ball BGA, 32-pin TSOPII and
32-pin SOIC
Reading from the device is accomplished 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.
The eight input/output pins (I/O0 through I/O7) are placed in a
high-impedance state when the device is deselected (CE
HIGH), the outputs are disabled (OE HIGH), or during a write
operation (CE LOW and WE LOW).
Logic Block Diagram
I/O
I/O
I/O
I/O
I/O
I/O
I/O
0
1
2
3
4
5
Data in Drivers
A
0
1
A
A
A
2
3
A
4
5
A
A
A
A
6
512K x 8
ARRAY
7
8
A
9
A
10
A
11
A12
6
7
POWER
DOWN
COLUMN
DECODER
CE
I/O
WE
OE
Note:
1. For best practice recommendations, please refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
Cypress Semiconductor Corporation
Document #: 38-05341 Rev. *B
•
3901 North First Street
•
San Jose, CA 95134
•
408-943-2600
Revised February 10, 2004