DS1374 datasheet(3/17 Pages) MAXIM

3 / 17 page

I2C, 32-Bit Binary Counter Watchdog RTC with

Trickle Charger and Reset Input/Output

_____________________________________________________________________

DC ELECTRICAL CHARACTERISTICS

(VCC = VCC(MIN) to VCC(MAX) , TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

(Note 5)

250

(Note 6)

2000

Trickle-Charge Current-Limiting

Resistors

(Note 7)

4000

Ω

Input Leakage

ILI

(Note 8)

-1

I/O Leakage

ILO

(Note 9)

-1

RST Pin I/O Leakage

ILORST

(Note 10)

-200

µA

SDA Logic 0 Output (VOL = 0.4V)

IOLSDA

3.0

VCC > 2V; VOL = 0.4V

3.0

1.71V < VCC < 2V; VOL = 0.2 VCC

3.0

RST, SQW, and INT Logic 0

Outputs (Note 11)

IOL1

1.3V < VCC < 1.71V; VOL = 0.2 VCC

250

µA

DS1374-18

150

DS1374-3

110

200

Active Supply Current

(Notes 11, 12)

ICCA

DS1374-33

180

300

µA

DS1374-18

100

DS1374-3

125

Standby Current (Notes 11, 13)

ICCS

DS1374-33

115

175

µA

VBACKUP Leakage Current

(VBACKUP = 3.7V)

IBACKUPLKG

100

DC ELECTRICAL CHARACTERISTICS

(VCC = 0V, VBACKUP = 3.7V, TA = -40°C to +85°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MAX

TYP

MAX

UNITS

VBACKUP Current (OSC ON);

SQW OFF

IBKOSC1

(Note 14)

400

700

VBACKUP Current (OSC ON);

SQW ON (32kHz)

IBKOSC2

(Notes 14, 15)

600

1000

VBACKUP Data-Retention Current

(OSC OFF)

IBACKUPDR

100

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