IS61LV256-15T Integrated Silicon Solution, IS61LV256-15T Datasheet

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IS61LV256-15T

Manufacturer Part Number
IS61LV256-15T
Description
Manufacturer
Integrated Silicon Solution
Datasheet

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Part Number:
IS61LV256-15T
Manufacturer:
ISSI
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5 510
Part Number:
IS61LV256-15T
Manufacturer:
ICSIISSI
Quantity:
4 474
ISSI reserves the right to make changes to its products at any time without notice in order to improve design and supply the best possible product. We assume no responsibility for any errors which
may appear in this publication. © Copyright 1996, Integrated Silicon Solution, Inc.
IS61LV256
FEATURES
• High-speed access time: 12, 15, 20, 25 ns
• Automatic power-down when chip is deselected
• CMOS low power operation
• TTL compatible interface levels
• Single 3.3V power supply
• Fully static operation: no clock or refresh
• Three-state outputs
Integrated Silicon Solution, Inc.
Rev. F 0296
SR81995LV61
IS61LV256
32K x 8 LOW VOLTAGE CMOS STATIC RAM
— 345 mW (max.) operating
— 7 mW (max.) CMOS standby
required
FUNCTIONAL BLOCK DIAGRAM
I/O0-I/O7
A0-A14
GND
VCC
CE
OE
WE
DECODER
CIRCUIT
CONTROL
CIRCUIT
DATA
I/O
DESCRIPTION
The
32,768-word by 8-bit static RAM. It is fabricated using
high-performance CMOS technology. This highly reliable pro-
cess coupled with innovative circuit design techniques, yields
access times as fast as 12 ns maximum.
When
mode at which the power dissipation is reduced to
50 W (typical) with CMOS input levels.
Easy memory expansion is provided by using an active LOW
Chip Enable (
both writing and reading of the memory.
The IS61LV256 is available in the JEDEC standard 28-pin,
300-mil DIP and SOJ, plus the 450-mil TSOP package.
ISSI
CE
is HIGH (deselected), the device assumes a standby
IS61LV256 is a very high-speed, low power,
MEMORY ARRAY
CE
COLUMN I/O
256 X 1024
). The active LOW Write Enable (
FEBRUARY 1996
ISSI
WE
) controls
ISSI
ISSI
2-1
®
's
®

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IS61LV256-15T Summary of contents

Page 1

... W (typical) with CMOS input levels. Easy memory expansion is provided by using an active LOW Chip Enable ( both writing and reading of the memory. The IS61LV256 is available in the JEDEC standard 28-pin, 300-mil DIP and SOJ, plus the 450-mil TSOP package. DECODER VCC I/O ...

Page 2

... IS61LV256 PIN CONFIGURATION 28-Pin DIP and SOJ A14 1 28 VCC A12 A13 A11 A10 I/O7 I/ I/O6 I/ I/O5 I/ I/O4 GND 14 15 I/O3 PIN DESCRIPTIONS A0-A14 Address Inputs CE Chip Enable Input ...

Page 3

... IS61LV256 OPERATING RANGE Range Ambient Temperature Commercial +70 C Industrial – + ELECTRICAL CHARACTERISTICS Symbol Parameter V Output HIGH Voltage OH V Output LOW Voltage OL V Input HIGH Voltage IH V Input LOW Voltage ( Input Leakage LI I Output Leakage LO Notes –3.0V for pulse width less than 10 ns. ...

Page 4

... IS61LV256 READ CYCLE SWITCHING CHARACTERISTICS Symbol Parameter t Read Cycle Time RC t Address Access Time AA t Output Hold Time OHA CE t Access Time ACE OE t Access Time DOE OE t (2) to Low-Z Output LZOE OE t (2) to High-Z Output HZOE CE t (2) to Low-Z Output ...

Page 5

... IS61LV256 AC WAVEFORMS (1,2) READ CYCLE NO. 1 ADDRESS D OUT (1,3) READ CYCLE NO. 2 ADDRESS OUT SUPPLY CURRENT Notes HIGH for a Read Cycle. 2. The device is continuously selected. 3. Address is valid prior to or coincident with Integrated Silicon Solution, Inc. Rev. F 0296 SR81995LV61 OHA ...

Page 6

... IS61LV256 WRITE CYCLE SWITCHING CHARACTERISTICS Symbol Parameter t Write Cycle Time Write End SCE t Address Setup Time to Write End AW t Address Hold from Write End HA t Address Setup Time (4) Pulse Width PWE t Data Setup to Write End SD t Data Hold from Write End ...

Page 7

... HD Order Part No. Package 12 IS61LV256-12NI 300-mil Plastic DIP 12 IS61LV256-12TI TSOP - 450 mil 12 IS61LV256-12JI 300-mil Plastic SOJ 15 IS61LV256-15NI 300-mil Plastic DIP 15 IS61LV256-15TI 450-mil TSOP 15 IS61LV256-15JI 300-mil Plastic SOJ 20 IS61LV256-20NI 300-mil Plastic DIP 20 IS61LV256-20TI 450-mil TSOP 20 IS61LV256-20JI 300-mil Plastic SOJ 25 IS61LV256-25NI 300-mil Plastic DIP ...

Page 8

... IS61LV256 2-8 ISSI Integrated Silicon Solution, Inc. 680 Almanor Avenue Sunnyvale, CA 94086 Fax: (408) 245-4774 Toll Free: 1-800-379-4774 http://www.issiusa.com Integrated Silicon Solution, Inc. ISSI ® ® Rev. F 0296 SR81995LV61 ...

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