DS1338 I
2
C RTC with 56-Byte NV RAM
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground………………………………………………………..……..-0.3V to +6.0V
Operating Temperature Range…………………………………………………………………………..……-40°C to +85°C
Storage Temperature Range………………………………………………………………………………...-55°C to +125°C
Soldering Temperature
…………….....
See precautions in the
Handling, PC Board Layout, and Assembly
Section.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only,
and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is
not implied. Exposure to the absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.3V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage
Logic 1
Logic 0
Pullup Resistor Voltage
(SQW/OUT)
Power-Fail Voltage
V
BAT
Input Voltage
SYMBOL
V
CC
V
IH
V
IL
V
PU
V
PF
V
BAT
CONDITIONS
DS1338-18
DS1338-3
DS1338-33
(Note 2)
(Note 2)
(Note 2)
DS1338-18
DS1338-3
DS1338-33
(Note 2)
1.51
2.45
2.70
1.3
1.62
2.59
2.82
3.0
MIN
1.71
2.7
3.0
0.7 x
V
CC
-0.3
TYP
1.8
3.0
3.3
MAX
1.89
3.3
5.5
V
CC
+
0.3
+0.3 x
V
CC
5.5
1.71
2.70
2.97
3.7
UNITS
V
V
V
V
V
V
DC ELECTRICAL CHARACTERISTICS
(V
CC
= V
CC(MIN)
to V
CC(MAX)
, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at V
CC
= 3.3V,
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Input Leakage
I/O Leakage
SDA Logic 0 Output
SYMBOL
I
LI
I
LO
I
OLSDA
CONDITIONS
(Note 3)
(Note 4)
V
CC
> 2V; V
OL
= 0.4V
V
CC
< 2V; V
OL
= 0.2 x V
CC
V
CC
> 2V; V
OL
= 0.4V
1.71V < V
CC
< 2V;
V
OL
= 0.2 V
CC
1.3V < V
CC
< 1.71V;
V
OL
= 0.2 V
CC
DS1338-18
DS1338-3
V
CC
≤
3.63V
DS1338-33
3.63V < V
CC
≤
5.5V
DS1338-18
DS1338-3
V
CC
≤
3.63V
DS1338-33
3.63V < V
CC
≤
5.5V
MIN
TYP
MAX
1
1
3.0
3.0
3.0
3.0
250
75
110
120
60
80
85
150
200
200
325
100
125
125
200
25
2 of 16
100
nA
mA
μA
UNITS
μA
μA
mA
SQW/OUT Logic 0 Output
I
OLSQW
Active Supply Current
(Note 5)
I
CCA
μA
Standby Current (Note 6)
I
CCS
μA
V
BAT
Leakage Current
(V
CC
Active)
I
BATLKG
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
