
ABSOLUTE MAXIMUM RATINGS 
1
PARAMETER
RATING
V
CC
 to V
SS
 Potential
–0.5 V to 7 V
Input Voltage Range
–0.5 V to V
CC
 + 0.5 V
DC Output Current 
2
±
 40 mA
–65
o
C to 150
o
C
Storage Temperature Range
Power Dissipation (Package Limit)
2 W
NOTES:
1.
Stresses greater than those listed under ‘Absolute Maximum Ratings’ may cause permanent damage to the device. This is a stress rating for
transient conditions only. Functional operation of the device at these or any other conditions above those indicated in the ‘Operating Range’
of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
2.
Outputs should not be shorted for more than 30 seconds. No more than one output should be shorted at any time.
OPERATING RANGES
SYMBOL
PARAMETER
MIN
TYP
MAX
UNIT
 T
A
Temperature, Ambient
0
70
o
C
 V
CC
Supply Voltage
4.5
5.0
5.5
V
 V
SS
Supply Voltage
0
0
0
V
 V
IL
Logic ‘0’ Input Voltage 
1
–0.5
0.8
V
 V
IH
Logic ‘1’ Input Voltage
2.2
V
CC
 + 0.5
V
NOTE:
1.
Negative undershoot of up to 3.0 V is permitted once per cycle.
DC ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
 I
CC1
Operating Current 
1
t
CYCLE
 = minimum
300
mA
 I
SB1
Standby Current
E 
≥
 V
CC
 – 0.2 V
V
IN
≥
 V
CC
 – 0.2 V or V
IN
≤
 0.2 V
f = 0
4
mA
 I
SB2
Standby Current
E 
≥
 V
IH
V
IN
 = V
IH
 or V
IL
50
mA
 I
LI
Input Leakage Current
V
IN
 = 0 V to V
CC
–2
2
μ
A
 I
LO
I/O Leakage Current
V
IN
 = 0 V to V
CC
–2
2
μ
A
 V
OH
Output High Voltage
I
OH
 = –4.0 mA
2.4
V
 V
OL
Output Low Voltage
I
OL
 = 8.0 mA
0.4
V
NOTE:
1.
I
CC
 is dependent upon output loading and cycle rates. Specified values are with outputs open.
CMOS 64K 
×
 18 Static RAM
LH521028A
5