CY62126EV30_09 Datasheet, PDF (1/13 Pages) Cypress Semiconductor – 1-Mbit (64K x 16) Static RAM

MoBL^®,CY62126EV30
1-Mbit (64K x 16) Static RAM
Features
■ High speed: 45 ns
■ Temperature ranges
❐ Industrial: –40°C to +85°C
❐ Automotive: –40°C to +125°C
■ Wide voltage range: 2.2V to 3.6V
■ Pin compatible with CY62126DV30
■ Ultra low standby power
❐ Typical standby current: 1 μA
❐ Maximum standby current: 4 μA
■ Ultra low active power
❐ Typical active current: 1.3 mA at f = 1 MHz
■ Easy memory expansion with CE and OE features
■ Automatic power down when deselected
■ CMOS for optimum speed and power
■ Offered in Pb-free 48-ball VFBGA and 44-pin TSOP II
packages
Logic Block Diagram
Functional Description
The CY62126EV30 is a high performance CMOS static RAM
organized as 64K words by 16 bits^[1]. 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 when addresses are not toggling. Placing the
device in standby mode reduces power consumption by more
than 99 percent when deselected (CE HIGH). The input and
output pins (IO₀ through IO₁₅) are placed in a high impedance
state when:
■ Deselected (CE HIGH)
■ Outputs are disabled (OE HIGH)
■ Both Byte High Enable and Byte Low Enable are disabled
(BHE, BLE HIGH)
■ Write operation is active (CE LOW and WE LOW)
To write to the device, take Chip Enable (CE) and Write Enable
(WE) inputs LOW. If Byte Low Enable (BLE) is LOW, then data
from IO pins (IO₀ through IO₇) is written into the location
specified on the address pins (A₀ through A₁₅). If Byte High
Enable (BHE) is LOW, then data from IO pins (IO₈ through IO₁₅)
is written into the location specified on the address pins (A₀
through A₁₅).
To read from the device, take Chip Enable (CE) 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.
Note
1. For best practice recommendations, refer to the Cypress application note AN1064, SRAM System Guidelines.
Cypress Semiconductor Corporation • 198 Champion Court
Document #: 38-05486 Rev. *E
• San Jose, CA 95134-1709 • 408-943-2600
Revised January 5, 2009
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