コンピュータ・ハードウェア Cypress Semiconductor CY62158EのPDF 仕様書をオンラインで閲覧またはダウンロードできます。Cypress Semiconductor CY62158E 11 ページ。 Mobl 8-mbit (1m x 8) static ram
ページを印刷するFeatures
■
Very high speed: 45 ns
❐
Wide voltage range: 4.5V – 5.5V
■
Ultra low active power
❐
Typical active current:1.8 mA @ f = 1 MHz
❐
Typical active current: 18 mA @ f = f
■
Ultra low standby power
Typical standby current: 2 μA
❐
Maximum standby current: 8 μA
❐
■
Easy memory expansion with CE
■
Automatic power down when deselected
■
CMOS for optimum speed and power
■
Offered in Pb-free 44-Pin TSOP II package
Functional Description
®
The CY62158E MoBL
is a high performance CMOS static RAM
organized as 1024K words by 8 bits. This device features
advanced circuit design to provide ultra low active current. This
Logic Block Diagram
CE 1
CE 2
Cypress Semiconductor Corporation
Document #: 38-05684 Rev. *D
max
, CE
and OE features
1
2
A 0
DATA IN DRIVERS
A 1
A 2
A 3
A 4
A 5
A 6
1024K x 8
A 7
A 8
ARRAY
A 9
A 10
A 11
A 12
COLUMN DECODER
WE
OE
•
198 Champion Court
8-Mbit (1M x 8) Static RAM
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 significantly when deselected (CE
CE
LOW).
2
To write to the device, take Chip Enables (CE
HIGH) and Write Enable (WE) input LOW. Data on the eight IO
pins (IO
through IO
) is then written into the location specified
0
7
on the address pins (A
through A
0
To read from the device, take Chip Enables (CE
HIGH) and OE LOW while forcing the WE HIGH. Under these
conditions, the contents of the memory location specified by the
address pins appear on the IO pins.
The eight input and output pins (IO
a high impedance state when the device is deselected (CE
HIGH or CE
LOW), the outputs are disabled (OE HIGH), or a
2
write operation is in progress (CE
LOW). See the
Truth Table
on page 8 for a complete description
of read and write modes.
For best practice recommendations, refer to the Cypress
application note
AN1064, SRAM System
POWER
DOWN
,
•
San Jose
CA 95134-1709
®
CY62158E MoBL
®
) in portable
HIGH or
1
LOW and CE
1
).
19
LOW and CE
1
through IO
) are placed in
0
7
LOW and CE
HIGH and WE
1
2
Guidelines.
IO 0
IO 1
IO 2
IO 3
IO 4
IO 5
IO 6
IO 7
•
408-943-2600
Revised June 16, 2008
2
2
1
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