Cypress Semiconductor CY62148ESL Specification Sheet

Features
■ Very high speed: 55 ns
■ Wide voltage range: 2.2V to 3.6V and 4.5V to 5.5V
■
Ultra low standby power
Typical standby current: 1 μA
❐
Maximum standby current: 7 μA
❐
■
Ultra low active power
❐ Typical active current: 2 mA at f = 1 MHz
■
Easy memory expansion with CE and OE features
■ Automatic power down when deselected
■ CMOS for optimum speed and power
■ Available in Pb-free 32-pin STSOP package
Logic Block Diagram
WE
Cypress Semiconductor Corporation
Document #: 001-50045 Rev. **
A 0
INPUT BUFFER
A 1
A 2
A 3
A 4
A 5
A 6
512K x 8
A 7
A 8
ARRAY
A 9
A 10
A 11
A 12
CE
COLUMN DECODER
OE
• 198 Champion Court
4-Mbit (512K x 8) Static RAM

Functional Description

The CY62148ESL 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
applications such as cellular telephones. The device also has an
automatic power down feature that significantly reduces power
consumption. Placing the device into standby mode reduces
power consumption by more than 99 percent when deselected
(CE HIGH). The eight input and output pins (IO
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).
To write to the device, take Chip Enable (CE) and Write Enable
(WE) inputs LOW. Data on the eight IO pins (IO
then written into the location specified on the address pins (A
through A ).
18
To read from the device, take 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 appear on the IO pins.
For best practice recommendations, refer to the Cypress
application note AN1064, SRAM System
POWER
DOWN
,
• San Jose CA 95134-1709
CY62148ESL MoBL
®
) in portable
through IO
0
through IO
0
Guidelines.
IO 0
IO 1
IO 2
IO 3
IO 4
IO 5
IO 6
IO 7
• 408-943-2600
Revised January 21, 2009
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