Datasheet

DS1338 I
2
C RTC with 56-Byte NV RAM
2 of 16
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
Lead Temperature (soldering, 10s) ……….………………………………………………………………………. +260°C
Soldering Temperature (reflow) ……………………………………………………………………………………. +260°C
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 T
A
= +25°C, unless
otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Supply Voltage V
CC
DS1338-18
1.71
1.8
5.5
V
DS1338-3
2.7
3.0
5.5
DS1338-33
3.0
3.3
5.5
Logic 1 V
IH
(Note 2)
0.7 x
V
CC
V
CC
+
0.3
V
Logic 0 V
IL
(Note 2) -0.3
+0.3 x
V
CC
V
Power-Fail Voltage V
PF
DS1338-18
1.51
1.62
1.71
V
DS1338-3
2.45
2.59
2.70
DS1338-33
2.70
2.82
2.97
V
BAT
Input Voltage V
BAT
(Note 2) 1.3 3.0 3.7 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
= TYP,
T
A
= +25°C, unless otherwise noted.) (Note 1)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Input Leakage I
LI
(Note 3) 1
µA
I/O Leakage I
LO
(Note 4) 1
µA
SDA Logic 0 Output I
OLSDA
V
CC
> 2V; V
OL
= 0.4V
3.0
mA
V
CC
< 2V; V
OL
= 0.2 x V
CC
3.0
SQW/OUT Logic 0 Output I
OLSQW
V
CC
> 2V; V
OL
= 0.4V
3.0
mA
1.71V < V
CC
< 2V;
V
OL
= 0.2 x V
CC
3.0
1.3V < V
CC
< 1.71V;
V
OL
= 0.2 x V
CC
250
µA
Active Supply Current
(Note 5)
I
CCA
DS1338-18: V
CC
= 1.89V
75
150
µA
DS1338-3: V
CC
= 3.30V
110
200
DS1338-33
V
CC
= 3.63V
120
200
V
CC
= 5.5V
325
Standby Current (Note 6) I
CCS
DS1338-18: V
CC
= 1.89V
60
100
µA
DS1338-3: V
CC
= 3.30V
80
125
DS1338-33
V
CC
= 3.63V
85
125
V
CC
= 5.5V
200
V
BAT
Leakage Current
(V
CC
Active)
I
BATLKG
25 100 nA