Cypress CY62148EV30 User Manual

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MoBL
®
CY62148EV30
4-Mbit (512K x 8) Static RAM
Cypress Semiconductor Corporation 198 Champion Court San Jose, CA 95134-1709 408-943-2600
Document #: 38-05576 Rev. *G Revised August 4, 2008
Features
Very high speed: 45 ns
Wide voltage range: 2.20V to 3.60V
Temperature ranges
Industrial: –40°C to +85°C
Automotive-A: –40°C to +85°C
Pin compatible with CY62148DV30
Ultra low standby power
Typical standby current: 1 μA
Maximum standby current: 7 μA (Industrial)
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 36-ball VFBGA, 32-pin TSOP II and 32-pin
SOIC
[1]
packages
Functional Description
The CY62148EV30
[2]
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. 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
0
through IO
7
) 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).
To write to the device, take Chip Enable (CE
) and Write Enable
(WE
) inputs LOW. Data on the eight IO pins (IO
0
through IO
7
) is
then written into the location specified on the address pins (A
0
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.
Notes
1. SOIC package is available only in 55 ns speed bin.
2. For best practice recommendations, refer to the Cypress application note “System Design Guidelines” at http://www.cypress.com.
Logic Block Diagram
A
0
IO
0
IO
7
IO
1
IO
2
IO
3
IO
4
IO
5
IO
6
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
SENSE AMPS
POWER
DOWN
CE
WE
OE
A
13
A
14
A
15
A
16
A
17
ROW DECODER
COLUMN DECODER
512K x 8
ARRAY
INPUT BUFFER
A
10
A
11
A
12
A
18
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Summary of Contents

Page 1 - 4-Mbit (512K x 8) Static RAM

MoBL® CY62148EV304-Mbit (512K x 8) Static RAMCypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600Document #

Page 2

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 10 of 12Figure 8. 32-pin (450 MIL) Molded SOIC (51-85081)Package Diagrams (continued)0.546[13.868]

Page 3

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 11 of 12Document History PageDocument Title: CY62148EV30 MoBL® 4-Mbit (512K x 8) Static RAMDocument

Page 4

Document #: 38-05576 Rev. *G Revised August 4, 2008 Page 12 of 12MoBL is a registered trademark, and More Battery Life is a trademark, of Cypress Semi

Page 5

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 2 of 12Pin Configuration [1, 3]Product PortfolioProduct Range VCC Range (V)Speed (ns)Power Dissipat

Page 6

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 3 of 12Maximum RatingsExceeding maximum ratings may impair the useful life of thedevice. These user

Page 7

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 4 of 12Capacitance (For All packages) [10]Parameter Description Test Conditions Max UnitCINInput Ca

Page 8

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 5 of 12Switching Characteristics (Over the Operating Range) [12]Parameter Description- 45 (Ind’l/Au

Page 9

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 6 of 12Switching Waveforms Figure 1. Read Cycle No. 1 (Address Transition Controlled) [16, 17]Figu

Page 10 - CY62148EV30

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 7 of 12Figure 4. Write Cycle No. 2 (CE Controlled) [19, 20]Figure 5. Write Cycle No. 3 (WE Contro

Page 11

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 8 of 12Ordering InformationSpeed(ns)Ordering CodePackageDiagramPackage TypeOperatingRange45 CY62148

Page 12

MoBL® CY62148EV30Document #: 38-05576 Rev. *G Page 9 of 12Figure 7. 32-pin TSOP II (51-85095)Package Diagrams (continued)51-85095-**[+] Feedback

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