IS61C256AH
PIN CONFIGURATION
28-Pin DIP and SOJ
A14
A12
A7
A6
A5
A4
A3
A2
A1
A0
I/O0
I/O1
I/O2
GND
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
ISSI
PIN CONFIGURATION
28-Pin TSOP
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
®
A10
CE
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
Chip Enable Input
Output Enable Input
Write Enable Input
Bidirectional Ports
Power
Ground
TRUTH TABLE
Mode
CE
OE
WE
I/O0-I/O7
Vcc
GND
WE
CE OE
H
L
L
L
X
H
L
X
I/O Operation Vcc Current
High-Z
High-Z
D
OUT
D
IN
I
SB
1
, I
SB
2
I
CC
I
CC
I
CC
Not Selected
X
(Power-down)
Output Disabled H
Read
H
Write
L
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 +7.0
–55 to +125
–65 to +150
1.5
20
Unit
V
°C
°C
W
mA
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.
2
Integrated Silicon Solution, Inc. — 1-800-379-4774
SR020-1O
05/24/99
ISSI [ INTEGRATED SILICON SOLUTION, INC ]
