CY62138VN Datasheet, PDF (1/8 Pages) Cypress Semiconductor – 256K x 8 Static RAM

CY62138VN MoBL^®
256K x 8 Static RAM
Features
• Temperature Ranges
— Industrial: –40°C to 85°C
• Low voltage range:
— 2.7–3.6V
• Ultra-low active power
• Low standby power
• Easy memory expansion with CS₁/CS₂ and OE features
• TTL-compatible inputs and outputs
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Offered in standard non-lead-free 36-ball FBGA
package
Logic Block Diagram
Functional Description
The CY62138VN is a high-performance CMOS static RAM
organized as 256K 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 reduces power
consumption by 99% when addresses are not toggling. The
device can be put into standby mode when deselected (CS₁
HIGH or CS₂ LOW). Writing to the device is accomplished by
taking Chip Enable One (CS₁) and Write Enable (WE) inputs
LOW and Chip Enable Two (CS₂) HIGH. Data on the eight I/O
pins (I/O₀ through I/O₇) is then written into the location
specified on the address pins (A₀ through A₁₇).Reading from
the device is accomplished by taking Chip Enable One (CS₁)
and Output Enable (OE) LOW while forcing Write Enable (WE)
and Chip Enable Two (CS₂) HIGH. Under these conditions, the
contents of the memory location specified by the address pins
will appear on the I/O pins.The eight input/output pins (I/O₀
through I/O₇) are placed in a high-impedance state when the
device is deselected (CS₁ HIGH or CS₂ LOW), the outputs are
disabled (OE HIGH), or during a write operation (CS₁ LOW,
CS₂ HIGH, and WE LOW).
PinConfiguration
FBGA
TOP View
1
2
34
56
A 0 A₁ CS₂ ^A₃ ^A6 A₈
A
Data in Drivers
A₀
A₁
A₂
A_A34
A5
A₆
256K x 8
ARRAY
AA₇₈
C^CS^S₂₁
WE
COLUMN
DECODER
OE
Product Portfolio
POWER
DOWN
I/O_{4 A2} WE A₄ A₇ I/O₀
B
I/O₀
I/O₁
I/O₅
NC A₅
I/O₁
C
I/O₂
V_SS
V_CC
D
I/O₃
V_CC
V_SS
E
I/O₄
I/O₅
I/O₆
NC A₁₇
I/O₂
F
I/O₆
I/O₇ OE ^CS1 A₁₆ A₁₅ I/O₃
G
I/O₇
A₉
A₁₀ A₁₁ A₁₂ A₁₃ A₁₄
H
Power Dissipation (Industrial)
Product
CY62138VN
V_CC(min)
2.7V
V_CC Range
V_CC(typ)^[1]
3.0V
V_CC(max)
3.6V
Speed
70 ns
Operating (I_cc)
Typ.^[1] Maximum
7 mA
15 mA
Standby (I_SB2)
Typ.^[1]
Maximum
1 µA
15 µA
Note:
1. Typical values are included for reference only and are not guaranteed or tested. Typical values are measured at V_CC = V_CC Typ, T_A = 25°C.
Cypress Semiconductor Corporation • 198 Champion Court • San Jose, CA 95134-1709 • 408-943-2600
Document #: 001-06513 Rev. **
Revised February 2, 2006
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