CY62187EV30, MoBL®
64 Mbit (4M x 16) Static RAM
ideal for providing More Battery Life™ (MoBL®) in portable appli-
cations such as cellular telephones. The device also has an
automatic power down feature that significantly reduces power
consumption by 99 percent when addresses are not toggling.
The device can also be put into standby mode when deselected
(CE1 HIGH or CE2 LOW or both BHE and BLE are HIGH). The
input and output pins (IO0 through IO15) are placed in a high
impedance state when: deselected (CE1HIGH or CE2 LOW),
outputs are disabled (OE HIGH), both Byte High Enable and
Byte Low Enable are disabled (BHE, BLE HIGH), or during a
write operation (CE1 LOW, CE2 HIGH and WE LOW).
Features
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■
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Very High Speed
55 ns
Wide Voltage Range
2.2V to 3.7V
Ultra Low Standby Power
❐
❐
❐
Typical Standby Current: 8 μA
❐
Maximum Standby Current: 48 μA
■
Ultra Low Active Power
Typical Active Current: 4.0 mA at f = 1 MHz
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 (IO0 through IO7), is
written into the location specified on the address pins (A0 through
❐
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Easy Memory Expansion with CE1, CE2, and OE Features
Automatic Power Down when Deselected
CMOS for Optimum Speed and Power
A
21). If Byte High Enable (BHE) is LOW, then data from I/O pins
(IO8 through IO15) is written into the location specified on the
address pins (A0 through A21).
Available in Pb-Free 48-Ball FBGA Package
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 appear
on IO0 to IO7. If Byte High Enable (BHE) is LOW, then data from
memory appears on IO8 to IO15. See the Truth Table on page 9
for a complete description of read and write modes.
Functional Description
The CY62187EV30 is a high performance CMOS static RAM
organized as 4M words by 16 bits[1]. This device features
advanced circuit design to provide ultra low active current. It is
Logic Block Diagram
DATA-IN DRIVERS
A10
A 9
A 8
A 7
A 6
A 5
A 4
A 3
4096K × 16
RAM Array
I/O0–I/O7
I/O8–I/O15
A 2
A 1
A 0
COLUMN DECODER
BHE
WE
CE2
CE
1
OE
BLE
Power-down
Circuit
Note
1. For best practice recommendations, refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
Cypress Semiconductor Corporation
Document #: 001-48998 Rev. *C
•
198 Champion Court
•
San Jose
,
CA 95134-1709
•
408-943-2600
Revised July 10, 2009
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