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CY62167EV18LL-55BVXI Datasheet(PDF) 1 Page - Cypress Semiconductor

Part # CY62167EV18LL-55BVXI
Description  16 Mbit (1M x 16) Static RAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY62167EV18LL-55BVXI Datasheet(HTML) 1 Page - Cypress Semiconductor

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CY62167EV18 MoBL®
16 Mbit (1M x 16) Static RAM
Cypress Semiconductor Corporation
198 Champion Court
San Jose
, CA 95134-1709
408-943-2600
Document #: 38-05447 Rev. *G
Revised March 13, 2009
Features
Very high speed: 55 ns
Wide voltage range: 1.65V to 2.25V
Ultra low standby power
Typical standby current: 1.5 μA
Maximum standby current: 12 μA
Ultra low active power
Typical active current: 2.2 mA at f = 1 MHz
Easy memory expansion with CE1, CE2, and OE features
Automatic power down when deselected
CMOS for optimum speed and power
Offered in Pb-free 48-ball VFBGA packages
Functional Description
The CY62167EV18 is a high performance CMOS static RAM
organized as 1M words by 16 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 reduces power consumption
by 99 percent when addresses are not toggling. Place the device
into standby mode when deselected (CE1 HIGH or CE2 LOW or
both BHE and BLE are HIGH). The input and output pins (I/O0
through I/O15) are placed in a high impedance state when: the
device is deselected (CE1HIGH or CE2 LOW); outputs are
disabled (OE HIGH); both Byte High Enable and Byte Low
Enable are disabled (BHE, BLE HIGH); and a write operation is
in progress (CE1 LOW, CE2 HIGH and WE LOW).
To write to the device, take Chip Enables (CE1 LOW and CE2
HIGH) and Write Enable (WE) input LOW. If Byte Low Enable
(BLE) is LOW, then data from I/O pins (I/O0 through I/O7) is
written into the location specified on the address pins (A0 through
A19). If Byte High Enable (BHE) is LOW, then data from I/O pins
(I/O8 through I/O15) is written into the location specified on the
address pins (A0 through A19).
To read from the device, take Chip Enables (CE1 LOW and CE2
HIGH) and Output Enable (OE) LOW while forcing the Write
Enable (WE) HIGH. If Byte Low Enable (BLE) is LOW, then data
from the memory location specified by the address pins appears
on I/O0 to I/O7. If Byte High Enable (BHE) is LOW, then data from
memory appears on I/O8 to I/O15. See the Truth Table on page
9 for a complete description of read and write modes.
For best practice recommendations, refer to the Cypress
application note AN1064, SRAM System Guidelines.
Power Down
Circuit
BHE
BLE
CE2
CE1
1M × 16
RAM ARRAY
IO0–IO7
A 8
A 7
A 6
A 5
A 2
COLUMN DECODER
DATA IN DRIVERS
OE
A 4
A 3
IO8–IO15
WE
BLE
BHE
A 0
A 1
A 9
A10
CE2
CE1
Logic Block Diagram
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