2
Integrated Silicon Solution, Inc. — www.issi.com —
1-800-379-4774
Rev. A
03/24/04
IS65C256
ISSI
PIN CONFIGURATION
32-Pin SOP
PIN CONFIGURATION
32-Pin TSOP (Type 1)
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
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
V
DD
WE
A13
A8
A9
A11
OE
A10
CS
I/O7
I/O6
I/O5
I/O4
I/O3
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
OE
A11
A9
A8
A13
WE
V
DD
A14
A12
A7
A6
A5
A4
A3
A10
CS
I/O7
I/O6
I/O5
I/O4
I/O3
GND
I/O2
I/O1
I/O0
A0
A1
A2
PIN DESCRIPTIONS
A0-A14
Address Inputs
CS
Chip Select Input
OE
Output Enable Input
WE
Write Enable Input
I/O0-I/O7
Input/Output
V
DD
Power
GND
Ground
TRUTH TABLE
Mode
WE
CS
OE
I/O Operation
V
DD
Current
Not Selected
(Power-down)
Output Disabled H
Read
Write
X
H
X
High-Z
I
SB
1
, I
SB
2
L
L
L
H
L
X
High-Z
D
OUT
D
IN
I
CC
1
, I
CC
2
I
CC
1
, I
CC
2
I
CC
1
, I
CC
2
H
L
ABSOLUTE MAXIMUM RATINGS
(1)
Symbol
V
TERM
T
BIAS
T
STG
P
T
I
OUT
Note:
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.
Parameter
Terminal Voltage with Respect to GND
Temperature Under Bias
Storage Temperature
Power Dissipation
DC Output Current (LOW)
Value
Unit
V
°C
°C
W
mA
–0.5 to +7.0
–55 to +125
–65 to +150
0.5
20