2-Wire Digital Input RTC with Alarm

2

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ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

wise 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.

Note 1:

Limits at -40°C are guaranteed by design and not production tested.

Note 2:

All voltages are referenced to ground.

Note 3:

Note 4:

Note 5:

Note 6:

CLK pin running at 32,768Hz, rise and fall times at 10ns or less.

Note 7:

Specified with 2-wire bus inactive.

Relative to Ground.............................................-0.3V to +6.0V

Voltage Range on SDA, SCL, and WDS

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage

(Note 2)

1.7

3.3

5.5

V

Timekeeping Voltage

(Note 2)

1.3

5.5

V

Input Logic 1 (SDA, SCL)

(Note 2)

V

Supply Voltage, Pullup

(SQW/

INT, CLK)

(Notes 2, 3)

5.5

V

Input Logic 0

(Notes 2, 4)

-0.3

+0.3

V

Input Leakage (SCL, CLK)

-1

+1

µA

I/O Leakage (SDA, SQW/

-1

+1

µA

SDA Logic 0 Output

3.0

mA

3.0

mA

SQW/

INT Logic 0 Output

250

µA

Active Supply Current

(Notes 5, 6)

33

150

µA

Standby Current

(Notes 6, 7)

150

500

nA