Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

2

_____________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

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.

Voltage Range on Inputs Relative

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

DS139x-33

2.97

3.3

5.50

DS139x-3

2.7

3.0

3.3

Supply Voltage (Note 2)

DS139x-18

1.71

1.8

1.89

V

Logic 1

(Note 2)

0.7 x

0.5

V

Logic 0

(Note 2)

-0.3

+0.3 x

V

Supply Voltage, Pullup

(Note 2)

5.5

V

-33

1.3

3.0

-3

1.3

3.0

3.7

-18

1.3

3.0

3.7

V

-33

2.70

2.88

2.97

-3

2.45

2.6

2.70

Power-Fail Voltage (Note 2)

-18

1.51

1.6

1.71

V

R1

(Notes 3, 4)

250

R2

(Notes 3, 5)

2000

Trickle-Charge Current-Limiting

Resistors

R3

(Notes 3, 6)

4000

Ω

Input Leakage

(Note 7)

-1

+1

µA

I/O Leakage

(Note 8)

-1

+1

µA

RST Pin I/O Leakage

(Note 9)

-200

+10

µA

DOUT Logic 1 Output

0.750

mA

DOUT Logic 0 Output

mA

3.0

mA

Logic 0 Output

(DS1390/DS1393 SQW/INT;

DS1392 SQW, INT;

DS1391/DS1393 RST)

250

µA

-33

2

-3

2

mA

(Note 10)

-18

500

µA