CY62158DV30
MoBL
8-Mbit (1024K x 8) MoBL Static RAM
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 by 85% when
deselected (CE1 HIGH or CE2 LOW).
Features
• Very high speed: 45 ns, 55 ns and 70 ns
— Wide voltage range: 2.20V – 3.60V
• Ultra-low active power
— Typical active current:1.5 mA @ f = 1 MHz
— Typical active current: 12 mA @ f = fmax
• Ultra-low standby power
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
• Easy memory expansion with CE1, CE2, and OE
through A19).
features
Reading from the device is accomplished by taking Chip
Enable 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
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 (CE1
LOW and CE2 HIGH), the outputs are disabled (OE HIGH), or
during a write operation (CE1 LOW and CE2 HIGH and WE
LOW). See the truth table for a complete description of read
and write modes.
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Packages offered in a 48-ball BGA, 48-pin TSOPI, and
44-pin TSOPII
Functional Description[1]
The CY62158DV30 is a high-performance CMOS static RAMs
organized as 1024K words by 8 bits. This device features
advanced circuit design to provide ultra-low active current.
Logic Block Diagram
I/O
I/O
I/O
I/O
I/O
I/O
I/O
0
Data in Drivers
A0
A1
A2
A3
A4
1
2
A
A5
A6
3
4
5
1024K x 8
A7
ARRAY
A98
A10
A11
A12
6
7
POWER
DOWN
COLUMN
CE
CE
1
2
DECODER
I/O
WE
OE
Note:
1. For best practice recommendations, please refer to the Cypress application note entitled System Design Guidelines, available at http://www.cypress.com.
Cypress Semiconductor Corporation
•
3901 North First Street
•
San Jose, CA 95134
•
408-943-2600
Document #: 38-05391 Rev. *D
Revised June 17, 2004
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