ISSI
TARGET SPECIFICATION
IS62Ux2568 Series
256K x 8 LOW VOLTAGE, LOW POWER
CMOS STATIC RAM
FEATURES
• Voltage range options
-- 1.6V to 2.0V: IS62UT2568
-- 1.8V to 2.2V: IS62US2568
-- 2.3V to 2.7V: IS62UR2568
-- 2.7V to 3.3V: IS62UP2568
• Battery backup (SL/LL version)
-- 1.0V (min.) data retention
• Access times: 55, 70, and 100 ns
• Fully static operation and tri-state outputs
• Industrial temperature available
• Available in 36-ball mini BGA and 32-pin
sTSOP(I)
®
ADVANCE INFORMATION
MAY 1999
DESCRIPTION
The
ISSI
IS62Ux2568 series is a low voltage, 262,144
words by 8 bits, CMOS SRAM. It is fabricated using
ISSI
's
low voltage, six transistor (6T), CMOS technology. The
series is targeted to satisfy the demands of the state-of-
the-art technologies such as cell phones and pagers.
When
CE
is HIGH (deselected), the device assumes a
standby mode at which the power dissipation can be
reduced down with CMOS input levels. Additionally, 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.
The IS62Ux2568 series is packaged in a 36-ball mini BGA
and a 32-pin TSOP (I).
PRODUCT SERIES OVERVIEW
Part No.
IS62UP2568
IS62UP2568
(1)
IS62UR2568
IS62UR2568
(1)
IS62US2568
IS62US2568
(1)
IS62UT2568
IS62UT2568
(1)
Voltage (V)
3.0,
±0.3
3.0,
±0.3
2.5,
±0.2
2.5,
±0.2
2.0,
±0.2
2.0,
±0.2
1.8,
±0.2
1.8,
±0.2
Speeds (ns)
55, 70, 100
55, 70, 100
55, 70, 100
55, 70, 100
55, 70, 100
55, 70, 100
55, 70, 100
55, 70, 100
Active I
CC
(mA)
25 @ 70 ns
25 @ 70 ns
15 @ 70 ns
15 @ 70 ns
10 @ 70 ns
10 @ 70 ns
10 @ 70 ns
10 @ 70 ns
Standby Current (
µ
A)
LL
SL
10
10
10
10
10
10
10
10
2
2
2
2
2
2
2
2
Temperature (
°
C)
0 to 70
40 to 85
0 to 70
40 to 85
0 to 70
40 to 85
0 to 70
40 to 85
Note:
1. Current value is max.
This document is a TARGET SPECIFICATION only. 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 1999, Integrated Silicon Solution, Inc.
2231 Lawson Lane • Santa Clara, CA 95054-3311 • 1-800-379-4774 • Fax: (408) 588-0806
e-mail: sales@issi.com •
www.issi.com
Integrated Silicon Solution, Inc. — 1-800-379-4774
TARGET SPECIFICAITON
SR068-0T
05/01/99
1
TARGET SPECIFICATION
IS62Ux2568 SERIES
TRUTH TABLE
Mode
Not Selected
Output Disabled
Read
Write
ISSI
CE
H
L
L
L
®
WE
X
H
H
L
OE
X
H
L
X
I/O0-I/O7
High-Z
High-Z
D
OUT
D
IN
Vcc Current
I
SB
, I
SB
1
I
CC
, I
CC
1
I
CC
, I
CC
1
I
CC
, I
CC
1
Note:
1. H = V
IH
, L = V
IL
, X = Don't Care.
OPERATING RANGE
Range
Commercial
Industrial
Ambient Temperature
0°C to +70°C
–40°C to +85°C
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
CC
V
TERM
T
STG
T
BIAS
P
T
Iout
Parameter
Power Supply Voltage Related to GND
Terminal Voltage with Respect to GND
Storage Temperature
Temperature Under Bias
Com.
Ind.
Power Dissipation
DC Output Current
Value
–0.5 to +4.0
–0.5 to Vcc + 0.5
–65 to +150
–10 to +85
–45 to +90
2.0
±20
Unit
V
V
°C
°C
°C
W
mA
Notes:
1. Stress greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device.
This is a stress rating only and functional operation of the device at these or any other conditions above those indicated
in the operational sections of this specification is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect reliability.
CAPACITANCE
(1)
Symbol
C
IN
C
OUT
Parameter
Input Capacitance
Input/Output Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Max.
6
8
Unit
pF
pF
Note:
1. Tested initially and after any design or process changes that may affect these parameters.
4
Integrated Silicon Solution, Inc. — 1-800-379-4774
TARGET SPECIFICATION
SR068-0T
05/01/99
TARGET SPECIFICATION
IS62Ux2568 SERIES
AC TEST CONDITIONS
(Over Operating Range)
Parameter
Input Pulse Level
(1)
IS62UP2568
IS62UR2568
IS62US2568
IS62UT2568
Unit
0.4V to 2.2V
0.4V to 2.2V
0.4V to 1.8V
0.4V to 1.6V
5 ns
1.5V
1.1V
0.9V
0.8V
CL
1
= 30 pF
+ 1TTL Load
CL
2
= 5 pF
ISSI
®
1
2
3
4
5
6
IS62UP2568
IS62UR2568
IS62US2568
IS62UT2568
Output Load (all test parameters except in Note 2)
(see Figure 1)
Output Load
(1)
(all High-Z and Low-Z parameters)
(see Figure 1)
Notes:
1. Including jig and scope capacitance.
2. V
TM
= 2.8V for Vcc = 3.0V
±
0.3V
V
TM
= 2.3V for Vcc = 2.5V
±
0.2V
V
TM
= 1.8V for Vcc = 2.0V
±
0.2V
V
TM
= 1.6V for Vcc = 1.8V
±
0.2V
Input Rise and Fall Times
Input and Output Timing
and Reference Level
AC TEST LOADS
3070
Ω
V
TM
7
8
3150
Ω
D
OUT
CL1,
CL2
9
Figure 1
10
11
12
Integrated Silicon Solution, Inc. — 1-800-379-4774
TARGET SPECIFICATION
SR068-0T
05/01/99
5
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