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Low-Current, SPI-Compatible
Real-Time Clock
2
Maxim Integrated
DS1347
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC = +2.0V to +5.5V, TA = -40
°C to +85°C. Typical values are at VCC = +3.3V, TA = +25°C, unless otherwise noted.) (Note 1)
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
absolute maximum rating conditions for extended periods may affect device reliability.
VCC to GND ..............................................................-0.3V to +6V
All Other Pins to GND ................................-0.3V to (VCC + 0.3V)
Current into Any Pin..........................................................±20mA
Rate of Rise, VCC ............................................................100V/s
Continuous Power Dissipation (TA = +70
°C)
TDFN (derate 24.4mW/
°C above +70°C)...................1.375mW
Junction Temperature .....................................................+150
°C
Storage Temperature Range…………………… -55
°C to +125°C
ESD Protection (All Pins, Human Body Model)................±2000V
Lead Temperature (soldering, 10s) .................................+300
°C
Soldering Temperature (reflow) .......................................+260
°C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Operating Voltage
Range
VCC
2
5.5
V
VCC = +2V
0.1
Active Supply Current
(Note 2)
ICC
VCC = +5V
0.25
mA
VCC = +2V
0.35
0.7
VCC = +3.6V
0.35
0.7
Timekeeping Supply
Current (Note 3)
ITK
VCC = +5V
0.4
0.8
μA
SPI DIGITAL INPUTS (SCLK, DIN,
CS)
VCC = +2V
1.4
Input High Voltage
VIH
VCC = +5V
2.2
V
VCC = +2V
0.6
Input Low Voltage
VIL
VCC = +5V
0.8
V
Input Leakage Current
IIL
VIN = 0 to VCC
-0.1
+0.1
μA
Input Capacitance
CIN
(Note 4)
10
pF
SPI DIGITAL OUTPUT (DOUT)
Output Leakage Current
IO
CS = VIH
-0.1
+0.1
μA
Output Capacitance
COUT
(Note 4)
15
pF
VCC = +2V, ISINK = 1.5mA
0.4
Output Low Voltage
VOL
VCC = +5V, ISINK = 4mA
0.4
V
VCC = +2V, ISOURCE = -0.4mA
1.8
Output High Voltage
VOH
VCC = +5V, ISOURCE = -1mA
4.5
V
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