DS1394U-33+T&R【PDF 12/26 页】IC RTC SPI 3WIRE W/CHRGR 10-MSOP

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Sheet目录1993

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DS1390–DS1394

Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

Maxim Integrated

ABSOLUTE MAXIMUM RATINGS

RECOMMENDED DC OPERATING CONDITIONS

(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at nominal supply voltage and 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.

Voltage Range on VCC Pin Relative to Ground .....-0.3V to +6.0V

Voltage Range on Inputs Relative

to Ground ...............................................-0.3V to (VCC + 0.3V)

Operating Temperature Range ...........................-40

°C to +85°C

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

Soldering Temperature...........................Refer to the IPC/JEDEC

J-STD-020 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)

VCC

DS139x-18

1.71

1.8

1.89

Logic 1

VIH

(Note 2)

0.7 x

VCC

VCC +

0.5

Logic 0

VIL

(Note 2)

-0.3

+0.3 x

VCC

Supply Voltage, Pullup

SQW/

INT, SQW, INT, VCC = 0V

VPU

(Note 2)

5.5

-33

1.3

3.0

VCC(MAX)

-3

1.3

3.0

3.7

VBACKUP Voltage (Note 2)

VBACKUP

-18

1.3

3.0

3.7

-33

2.70

2.88

2.97

-3

2.45

2.6

2.70

Power-Fail Voltage (Note 2)

VPF

-18

1.51

1.6

1.71

(Notes 3, 4)

250

(Notes 3, 5)

2000

Trickle-Charge Current-Limiting

Resistors

(Notes 3, 6)

4000

Input Leakage

ILI

(Note 7)

-1

I/O Leakage

ILO

(Note 8)

-1

RST Pin I/O Leakage

ILORST

(Note 9)

-200

+10

-33, -3 (VOH = 0.85 x VCC)

-1

DOUT Logic 1 Output

IOHDOUT

-18 (VOH = 0.80 x VCC)

0.750

-33, -3 (VOL = 0.15 x VCC)

DOUT Logic 0 Output

IOHDOUT

-18 (VOL = 0.20 x VCC)

VCC > 1.71V; VOL = 0.4V

3.0

Logic 0 Output

(DS1390/DS1393/DS1394

SQW/

INT; DS1392 SQW, INT;

DS1391/DS1393

RST)

IOLSIR

1.3V < VCC < 1.71V; VOL = 0.4V

250

-33

-3

VCC Active Supply Current

(Note 10)

ICCA

-18

500

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