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.
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. K
12/11/02
1
IS62LV256
PIN CONFIGURATION
28-Pin SOJ and SOP
ISSI
28-Pin TSOP (Type I) (Normal Bent)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
WE
A13
A8
A9
A11
OE
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
OE
A11
A9
A8
A13
WE
VCC
A14
A12
A7
A6
A5
A4
A3
22
23
24
25
26
27
28
1
2
3
4
5
6
7
21
20
19
18
17
16
15
14
13
12
11
10
9
8
®
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
A10
CE
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
28-Pin TSOP (Type I) (Reverse Bent)
PIN DESCRIPTIONS
A0-A14
CE
OE
WE
I/O0-I/O7
Vcc
GND
Address Inputs
Chip Enable Input
Output Enable Input
Write Enable Input
Input/Output
Power
Ground
A3
A4
A5
A6
A7
A12
A14
VCC
WE
A13
A8
A9
A11
OE
7
6
5
4
3
2
1
28
27
26
25
24
23
22
8
9
10
11
12
13
14
15
16
17
18
19
20
21
A2
A1
A0
I/O0
I/O1
I/O2
GND
I/O3
I/O4
I/O5
I/O6
I/O7
CE
A10
TRUTH TABLE
Mode
Not Selected
(Power-down)
Output Disabled
Read
Write
WE
X
H
H
L
CE
H
L
L
L
OE
X
H
L
X
I/O Operation
High-Z
High-Z
D
OUT
D
IN
Vcc Current
I
SB
1
, I
SB
2
I
CC
1
, I
CC
2
I
CC
1
, I
CC
2
I
CC
1
, I
CC
2
2
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. K
12/11/02
IS62LV256
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
TERM
T
BIAS
T
STG
P
T
I
OUT
Parameter
Terminal Voltage with Respect to GND
Temperature Under Bias
Storage Temperature
Power Dissipation
DC Output Current (LOW)
Value
–0.5 to +4.6
–55 to +125
–65 to +150
0.5
20
Unit
V
°C
°C
W
mA
ISSI
®
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.
OPERATING RANGE
Range
Commercial
Industrial
Ambient Temperature
0°C to +70°C
–40°C to +85°C
V
CC
3.3V ± 5%
3.3V ± 5%
DC ELECTRICAL CHARACTERISTICS
(Over Operating Range)
Symbol Parameter
V
OH
V
OL
V
IH
V
IL
I
LI
I
LO
Output HIGH Voltage
Output LOW Voltage
Input HIGH Voltage
Input LOW Voltage
(1)
Input Leakage
Output Leakage
GND
≤
V
IN
≤
V
CC
GND
≤
V
OUT
≤
V
CC
, Outputs Disabled
Com.
Ind.
Com.
Ind.
Test Conditions
V
CC
= Min., I
OH
= –1.0 mA
V
CC
= Min., I
OL
= 2.1 mA
Min.
2.4
—
2.2
–0.3
–2
–5
–2
–5
Max.
—
0.4
V
CC
+ 0.3
0.8
2
5
2
5
Unit
V
V
V
V
µA
µA
Notes:
1. V
IL
= –3.0V for pulse width less than 10 ns.
2. Not more than one output should be shorted at one time. Duration of the short circuit should not exceed 30 seconds.
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. K
12/11/02
3
IS62LV256
POWER SUPPLY CHARACTERISTICS
(1)
(Over Operating Range)
Symbol
I
CC
1
I
CC
2
I
SB
1
Parameter
Vcc Operating
Supply Current
Vcc Dynamic Operating
Supply Current
TTL Standby Current
(TTL Inputs)
CMOS Standby
Current (CMOS Inputs)
Test Conditions
V
CC
= Max.,
CE
= V
IL
I
OUT
= 0 mA, f = 0
V
CC
= Max.,
CE
= V
IL
I
OUT
= 0 mA, f = f
MAX
V
CC
= Max.,
V
IN
= V
IH
or V
IL
CE
≥
V
IH
, f = 0
V
CC
= Max.,
CE
≥
V
CC
– 0.2V,
V
IN
≥
V
CC
– 0.2V, or
V
IN
≤
0.2V, f = 0
Com.
Ind.
Com.
Ind.
Com.
Ind.
Com.
Ind.
-45 ns
Min.
Max.
—
—
—
—
—
—
—
—
20
30
35
45
2
5
90
200
ISSI
-70 ns
Min.
Max.
—
—
—
—
—
—
—
—
20
30
30
40
2
5
90
200
Unit
mA
mA
mA
®
I
SB
2
µA
Notes:
1. At f = f
MAX
, address and data inputs are cycling at the maximum frequency, f = 0 means no input lines change.
CAPACITANCE
(1,2)
Symbol
C
IN
C
OUT
Parameter
Input Capacitance
Output Capacitance
Conditions
V
IN
= 0V
V
OUT
= 0V
Max.
6
5
Unit
pF
pF
Notes:
1. Tested initially and after any design or process changes that may affect these parameters.
2. Test conditions: T
A
= 25°C, f = 1 MHz, Vcc =3.3V.
4
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. K
12/11/02
IS62LV256
AC TEST CONDITIONS
Parameter
Input Pulse Level
Input Rise and Fall Times
Input and Output Timing
and Reference Levels
Output Load
Unit
0V to 3.0V
5 ns
1.5V
See Figures 1a and 1b
ISSI
®
1213
Ω
3.3V
3.3V
1213
Ω
OUTPUT
100 pF
Including
jig and
scope
1378
Ω
OUTPUT
5 pF
Including
jig and
scope
1378
Ω
Figures 1a
Figures 1b
READ CYCLE SWITCHING CHARACTERISTICS
(1)
(Over Operating Range)
-45 ns
Symbol
Parameter
Read Cycle Time
Address Access Time
Output Hold Time
CE
Access Time
OE
Access Time
OE
to Low-Z Output
OE
to High-Z Output
CE
to Low-Z Output
CE
to High-Z Output
CE
to Power-Up
CE
to Power-Down
Min.
45
—
2
—
—
0
0
3
0
0
—
Max.
—
45
—
45
25
—
20
—
20
—
30
Min.
70
—
2
—
—
0
0
3
0
0
—
-70 ns
Max.
—
70
—
70
35
—
25
—
25
—
50
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
t
RC
t
AA
t
OHA
t
ACE
t
DOE
t
LZOE
(2)
t
HZOE
(2)
t
LZCE
(2)
t
HZCE
(2)
t
PU
(3)
t
PD
(3)
Notes:
1. Test conditions assume signal transition times of 5 ns or less, timing reference levels of 1.5V, input pulse levels of 0 to 3.0V and
output loading specified in Figure 1a.
2. Tested with the load in Figure 1b. Transition is measured ±500 mV from steady-state voltage. Not 100% tested.
3. Not 100% tested.
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