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DS32kHz
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground………………………………………………………………-3.0V to +7.0V
Operating Temperature Range (Noncondensing)
Commercial:…………………………………………………………………………………………………..0°C to +70°C
Industrial:……………………………………………………………………………………………………-40°C to +85°C
Storage Temperature Range………………………………………………………………………………….-40°C to +85°C
Soldering Temperature (BGA, SO)……………………….See the Handling, PC Board Layout, and Assembly section.
Soldering Temperature, Leads (DIP)……………………………………………………..+260°C for 10 seconds ( 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 the absolute maximum rating conditions for extended periods may affect device reliability.
RECOMMENDED DC OPERATING CONDITIONS
(T A = -40°C to +85°C) (Note 1)
PARAMETER
Power-Supply Voltage
Battery Voltage
SYMBOL
V CC
V BAT
CONDITIONS
(Note 2)
(Notes 2, 3)
MIN
4.5
2.7
TYP
5.0
3.0
MAX
5.5
3.5,
5.5
UNITS
V
V
DC ELECTRICAL CHARACTERISTICS
(Over the operating range, unless otherwise specified.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Active Supply Current
Battery Input-Leakage Current
I CC
I BATLKG
V BAT = 0V or
2.7V ≤ V BAT ≤ 3.5V
(Notes 3, 4)
V CC MIN ≤ V CC ≤ V CC MAX
-50
150
220
+50
μ A
nA
High Output Voltage (V CC )
Low Output Voltage
High Output Voltage (V BAT )
Battery Switch Voltage
V OH
V OL
V OH
V SW
I OH = -1.0mA (Note 2)
I OL = 2.1mA (Note 2)
I OH = -0.1mA (Note 2)
(Note 2)
2.4
2.4
V BAT
0.4
V
V
V
V
(V CC = 0V, T A = -40°C to +85°C.) (Note 1)
PARAMETER
Active Battery Current
Battery Current During
Temperature Measurement
SYMBOL
I BAT
I BATCNV
CONDITIONS
V BAT = 3.3V (Notes 4, 5, 6)
V BAT = 3.3V (Notes 4, 5, 7)
MIN
TYP
1
450
MAX
4
UNITS
μ A
μ A
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
Note 6:
Note 7:
Limits at -40°C are guaranteed by design and are not production tested.
All voltages are referenced to ground.
V BAT must be no greater than 3.5V when the device is used in the dual-supply operating modes.
Typical values are at +25°C and 5.0V V CC , 3.0 V BAT , unless otherwise indicated.
These parameters are measured under no output load conditions.
This current is the active-mode current sourced from the backup supply/battery.
A temperature conversion lasts 122ms (typ) and occurs on power-up and then once every 64 seconds.
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