DS1340C-18 datasheet(3/13 Pages) MAXIM

Part #	DS1340C-18

Description	I2C RTC with Trickle Charger

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Manufacturer	MAXIM [Maxim Integrated Products]

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I2C RTC with Trickle Charger

_____________________________________________________________________

3

RECOMMENDED DC OPERATING CONDITIONS

(VCC = VCC MIN to VCC MAX, TA = -40°C to +85°C, unless otherwise noted. Typical values are at VCC = 3.3V, TA = +25°C, unless

otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DS1340-18

1.71

1.8

1.89

DS1340-3

2.7

3.0

3.3

Supply Voltage (Note 8)

VCC

DS1340-33

2.97

3.3

5.5

V

Input Logic 1 (SDA, SCL)

VIH

(Note 8)

0.7 x VCC

VCC + 0.3

V

Input Logic 0 (SDA, SCL)

VIL

(Note 8)

-0.3

+0.3 x VCC

V

Supply Voltage, Pullup

(FT/OUT, SDA, SCL), VCC = 0V

VPU

(Note 8)

5.5

V

DS1340-18

1.3

3.7

DS1340-3

1.3

3.7

Backup Supply Voltage (Note 8)

VBACKUP

DS1340-33

1.3

5.5

V

R1

(Notes 9, 10)

250

R2

(Note 11)

2000

Trickle-Charge Current-Limiting

Resistors

R3

(Note 12)

4000

Ω

DS1340-18

1.51

1.6

1.71

DS1340-3

2.45

2.6

2.7

Power-Fail Voltage (Note 8)

VPF

DS1340-33

2.70

2.88

2.97

V

Input Leakage (SCL, CLK)

ILI

-1

+1

µA

I/O Leakage (SDA, FT/OUT)

ILO

-1

+1

µA

VCC > 2V; VOL = 0.4V

3.0

SDA Logic 0 Output

IOLSDA

1.7V < VCC < 2V; VOL = 0.2 x VCC

3.0

mA

VCC > 2V; VOL = 0.4V

3.0

1.7V < VCC < 2V; VOL = 0.2 x VCC

3.0

mA

FT/OUT Logic 0 Output

IOLSQW

1.3V < VCC < 1.7V; VOL = 0.2x VCC

250

µA

DS1340-18

72

150

DS1340-3

108

200

Active Supply Current (Note 13)

ICCA

DS1340-33

192

300

µA

DS1340-18

60

100

DS1340-3

81

125

Standby Current (Note 14)

ICCS

DS1340-33

100

150

µA

VBACKUP Leakage Current

IBACKUPLKG VBACKUP = 3.7V

100

nA

DC ELECTRICAL CHARACTERISTICS

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

IBACKUP1

OSC ON, FT = 0 (Note 15)

800

1150

IBACKUP2

OSC ON, FT = 1 (Note 15)

850

1250

VBACKUP Current

IBACKUP3

OSC ON, FT = 0, VBACKUP = 3.0V,

TA = +25°C (Notes 15, 16)

800

1000

nA

VBACKUP Data-Retention Current

IBACKUPDR OSC OFF

25.0

100

nA

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