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61LV25616AL Datasheet(PDF) 1 Page - Integrated Silicon Solution, Inc

Part No. 61LV25616AL
Description  256K x 16 HIGH SPEED ASYNCHRONOUS CMOS STATIC RAM WITH 3.3V SUPPLY
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Maker  ISSI [Integrated Silicon Solution, Inc]
Homepage  http://www.issi.com
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Integrated Silicon Solution, Inc. — www.issi.com — 1-800-379-4774
1
Rev. A
02/21/03
IS61LV25616AL
ISSI®
Copyright © 2003 Integrated Silicon Solution, Inc. All rights reserved. ISSI reserves the right to make changes to this specification and its products at any time
without notice. ISSI assumes no liability arising out of the application or use of any information, products or services described herein. Customers are advised to
obtain the latest version of this device specification before relying on any published information and before placing orders for products.
FEATURES
• High-speed access time:
— 10, 12 ns
• CMOS low power operation
• Low stand-by power:
— Less than 5 mA (typ.) CMOS stand-by
• TTL compatible interface levels
• Single 3.3V power supply
• Fully static operation: no clock or refresh
required
• Three state outputs
• Data control for upper and lower bytes
• Industrial temperature available
256K x 16 HIGH SPEED ASYNCHRONOUS
CMOS STATIC RAM WITH 3.3V SUPPLY
DESCRIPTION
The
ISSI IS61LV25616AL is a high-speed, 4,194,304-bit
static RAM organized as 262,144 words by 16 bits. It is
fabricated using
ISSI's high-performance CMOS technol-
ogy. This highly reliable process coupled with innovative
circuit design techniques, yields high-performance and low
power consumption devices.
When
CE is HIGH (deselected), the device assumes a
standby mode at which the power dissipation can be
reduced down with CMOS input levels.
Easy memory expansion is provided by using Chip Enable
and Output Enable inputs,
CE and OE. The active LOW
Write Enable (
WE) controls both writing and reading of the
memory. A data byte allows Upper Byte (
UB) and Lower
Byte (
LB) access.
The IS61LV25616AL is packaged in the JEDEC standard
44-pin 400-mil SOJ, 44-pin TSOP Type II, 44-pin LQFP and
48-pin Mini BGA (8mm x 10mm).
FUNCTIONAL BLOCK DIAGRAM
A0-A17
CE
OE
WE
256K x 16
MEMORY ARRAY
DECODER
COLUMN I/O
CONTROL
CIRCUIT
GND
VDD
I/O
DATA
CIRCUIT
I/O0-I/O7
Lower Byte
I/O8-I/O15
Upper Byte
UB
LB
FEBRUARY 2003




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