DS1338 I2C 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
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V,
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
DS1338-18
DS1338-3
MIN
TYP
MAX
UNITS
1.71
2.7
3.0
1.8
3.0
3.3
1.89
3.3
5.5
Supply Voltage
VCC
V
DS1338-33
0.7 x
VCC
VCC +
Logic 1
Logic 0
VIH
VIL
(Note 2)
(Note 2)
(Note 2)
V
V
V
0.3
+0.3 x
VCC
-0.3
Pullup Resistor Voltage
(SQW/OUT)
VPU
5.5
DS1338-18
DS1338-3
DS1338-33
1.51
2.45
2.70
1.62
2.59
2.82
1.71
2.70
2.97
Power-Fail Voltage
VBAT Input Voltage
VPF
V
V
VBAT
(Note 2)
1.3
3.0
3.7
DC ELECTRICAL CHARACTERISTICS
(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V,
TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Input Leakage
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
ILI
(Note 3)
(Note 4)
1
μA
μA
I/O Leakage
ILO
1
VCC > 2V; VOL = 0.4V
CC < 2V; VOL = 0.2 x VCC
3.0
3.0
3.0
SDA Logic 0 Output
IOLSDA
mA
mA
μA
V
VCC > 2V; VOL = 0.4V
1.71V < VCC < 2V;
VOL = 0.2 VCC
1.3V < VCC < 1.71V;
VOL = 0.2 VCC
DS1338-18
3.0
SQW/OUT Logic 0 Output
IOLSQW
250
75
110
120
150
200
200
DS1338-3
Active Supply Current
(Note 5)
ICCA
VCC ≤ 3.63V
μA
DS1338-33
3.63V < VCC
5.5V
≤
≤
325
DS1338-18
DS1338-3
60
80
85
100
125
125
Standby Current (Note 6)
ICCS
VCC ≤ 3.63V
3.63V < VCC
5.5V
μA
DS1338-33
200
VBAT Leakage Current
(VCC Active)
IBATLKG
25
100
nA
2 of 16
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
