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DS1338 Datasheet, PDF (2/16 Pages) Maxim Integrated Products – I2C RTC with 56-Byte NV RAM
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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
MIN TYP MAX UNITS
Supply Voltage
Logic 1
Logic 0
Pullup Resistor Voltage
(SQW/OUT)
Power-Fail Voltage
DS1338-18
VCC
DS1338-3
DS1338-33
VIH
(Note 2)
VIL
(Note 2)
VPU
(Note 2)
DS1338-18
VPF
DS1338-3
DS1338-33
1.71
1.8
1.89
2.7
3.0
3.3
V
3.0
3.3
5.5
0.7 x
VCC
VCC +
0.3
V
-0.3
+0.3 x
VCC
V
5.5
V
1.51 1.62 1.71
2.45 2.59 2.70
V
2.70 2.82 2.97
VBAT Input Voltage
VBAT
(Note 2)
1.3
3.0
3.7
V
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
SYMBOL
CONDITIONS
MIN TYP MAX
UNITS
Input Leakage
I/O Leakage
SDA Logic 0 Output
SQW/OUT Logic 0 Output
Active Supply Current
(Note 5)
Standby Current (Note 6)
VBAT Leakage Current
(VCC Active)
ILI
ILO
IOLSDA
IOLSQW
ICCA
ICCS
IBATLKG
(Note 3)
(Note 4)
VCC > 2V; VOL = 0.4V
VCC < 2V; VOL = 0.2 x VCC
VCC > 2V; VOL = 0.4V
1.71V < VCC < 2V;
VOL = 0.2 VCC
1.3V < VCC < 1.71V;
VOL = 0.2 VCC
DS1338-18
DS1338-3
DS1338-33
VCC ≤ 3.63V
3.63V < VCC ≤
5.5V
DS1338-18
DS1338-3
DS1338-33
VCC ≤ 3.63V
3.63V < VCC ≤
5.5V
2 of 16
1
μA
1
μA
3.0
3.0
mA
3.0
mA
3.0
250
μA
75
150
110
200
120
200
μA
325
60
100
80
125
85
125
μA
200
25
100
nA
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