RTC with Constant-Voltage Trickle Charger

2

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ABSOLUTE MAXIMUM RATINGS

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.

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-55°C to +125°C

Soldering Temperature .......................................See IPC/JEDEC

J-STD-020A Specification

Soldering Temperature (leads, 10s) ................................+260°C

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

-33

2.97

3.3

3.63

Supply Voltage (Note 2)

-5

4.5

5.0

5.5

V

(DS12R885 Only)

(Note 2)

2.0

V

Input Logic 1

(Note 2)

2.2

0.3

V

Input Logic 0

(Note 2)

-0.3

+0.8

V

-33

0.7

2

(Note 3)

-5

0.8

2

mA

-5

0.250

0.5

-33

0.140

0.3

mA

Input Leakage

-1.0

+1.0

µA

I/O Leakage

(Note 5)

-1.0

+1.0

µA

Input Current

(Note 6)

-1.0

+500

µA

Output Current at 2.4V

(Note 2)

-1.0

mA

Output Current at 0.4V

(Note 2)

4.0

mA

-33

2.7

2.88

2.97

Power-Fail Voltage (Note 2)

-5

4.05

4.33

4.5

V

-33

VRT Trip Point

-5

1.3

V

Trickle-Charger Current-Limiting

Resistor

R1

DS12R885 Only

10

k

Ω

Trickle-Charger Output Voltage

DS12R885 Only

3.05

V