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CY62146DV30L-70ZSXI Datasheet(PDF) 1 Page - Cypress Semiconductor

Part # CY62146DV30L-70ZSXI
Description  4-Mbit (256K x 16) Static RAM
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Manufacturer  CYPRESS [Cypress Semiconductor]
Direct Link  http://www.cypress.com
Logo CYPRESS - Cypress Semiconductor

CY62146DV30L-70ZSXI Datasheet(HTML) 1 Page - Cypress Semiconductor

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4-Mbit (256K x 16) Static RAM
CY62146DV30
Cypress Semiconductor Corporation
3901 North First Street
San Jose
, CA 95134
408-943-2600
Document #: 38-05339 Rev. *A
Revised February 2, 2005
Features
• Very high speed: 45 ns
• Wide voltage range: 2.20V–3.60V
• Pin-compatible with CY62146CV30
• Ultra-low active power
— Typical active current: 1.5 mA @ f = 1 MHz
— Typical active current: 8 mA @ f = fmax
• Ultra low standby power
• Easy memory expansion with CE, and OE features
• Automatic power-down when deselected
• CMOS for optimum speed/power
• Packages offered 48-ball BGA and 44-pin TSOPII
• Also available in Lead-free packages
Functional Description[1]
The CY62146DV30 is a high-performance CMOS static RAM
organized as 256K words by 16 bits. This device features ad-
vanced 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. The device can also be put into standby
mode reducing power consumption by more than 99% when
deselected (CE HIGH). The input/output pins (I/O0 through
I/O15) 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),
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
(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 A17). 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 A17).
Reading from the device is accomplished by taking 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 will appear on I/O0 to I/O7. If Byte High Enable (BHE) is
LOW, then data from memory will appear on I/O8 to I/O15. See
the truth table at the back of this data sheet for a complete
description of read and write modes.
The CY62146DV30 is available in a 48-ball VFBGA, 44-pin
TSOPII packages.
Note:
1. For best practice recommendations, please refer to the Cypress application note “System Design Guidelines” on http://www.cypress.com.
Logic Block Diagram
256K x 16
RAM Array
I/O0–I/O7
A8
A7
A6
A5
A2
COLUMN DECODER
DATA IN DRIVERS
OE
A4
A3
I/O8–I/O15
CE
WE
BLE
BHE
A0
A1
A9
A10


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