— Industrial: –40°C to +85°C
— Automotive-A: –40°C to +85°C
— Automot ive-E: –40°C to +125°C
• Very high speed: 45 ns
• Wide voltage range: 2.20V–3.60V
• Pin-compatible with CY62147CV25, CY62147CV30, and
CY62147CV33
• Ultra-low active power
— Typical active current: 1.5 mA @ f = 1 MHz
— Typical active current: 8 mA @ f = f
• Ultra low standby power
• Easy memory expansion with CE
, and OE features
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Available in Pb-free and non Pb-free 48-ball VFBGA and
non Pb-free 44-pin TSOPII
• Byte power-down feature
Functional Description
[1]
The CY62147DV30 is a high-performance CMOS static RAM
organized as 256K words by 16 bits. This device features ad-
max
vanced circuit design to provide ultra-low active current. Thi s
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. The device can also be put into standby
mode reducing power consumption by more than 99% when
deselected (CE
input/output pins (I/O
pedance state when: deselected (CE
abled (OE
are disabled (BHE
HIGH or both BLE and BHE are HIGH). The
through I/O15) are placed in a high-im-
0
HIGH), outputs are dis-
HIGH), both Byte High Enable and Byte Low Enable
, BLE HIGH), or during a write operation (CE
LOW and WE LOW).
Writing to the device is accomplished by taking Chip Enable
(CE
) and Write Enable (WE) inputs LOW. If Byte Low Enable
) is LOW, then data from I/O pins (I/O0 through I/O7), is
(BLE
written into the location specified on the address pins (A
through A17). If Byte High Enable (BHE) is LOW, then data
from I/O pins (I/O
specified on the address pins (A
through I/O15) is written into the location
8
through A17).
0
Reading from the device is accomplished by taking Chip
Enable (CE
Write Enable (WE
) and Output Enable (OE) LOW while forcing the
) HIGH. If Byte Low Enable (BLE) is LOW,
then data from the memory location specified by the address
pins will appear on I/O0 to I/O7. If Byte High Enable (BHE) is
LOW, then data from memory will appear on I/O
the truth table at the back of this data sheet for a complete
to I/O15. See
8
description of read and write modes.
The CY62147DV30 is available in a 48-ball VFBGA, 44 Pin
TSOPII packages.
0
Logic Block Diagram
A
10
A
9
A
8
A
7
A
6
A
5
A
4
A
3
A
2
A
1
A
0
Power -Down
Circuit
Note:
1. For best practice recommendations, please refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
DATA IN DRIVERS
256K x 16
RAM Array
ROW DECODER
COLUMN DECODER
11
A
A12A
I/O
–I/O
0
7
SENSE AMPS
CE
16
15
A
BHE
BLE
17
A
A
14
A
13
I/O8–I/O
15
BHE
WE
CE
OE
BLE
Cypress Semiconductor Corporation•198 Champion Court•San Jose, CA 95134-1709•408-943-2600
Document #: 38-05340 Rev. *F Revised August 31, 2006