DS1340_11 datasheet(2/16 Pages) MAXIM

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I2C RTC with Trickle Charger

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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 VCC = 3.3V, 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 SDA, SCL, and FT/OUT

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

Lead Temperature (soldering, 10s) .................................+260°C

Soldering Temperature (reflow) .......................................+260°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

DS1340-18

1.71

1.8

5.5

DS1340-3

2.7

3.0

5.5

Supply Voltage (Note 2)

VCC

DS1340-33

2.97

3.3

5.5

Input Logic 1 (SDA, SCL)

VIH

(Note 2)

0.7 x VCC

VCC + 0.3

Input Logic 0 (SDA, SCL)

VIL

(Note 2)

-0.3

+0.3 x VCC

Supply Voltage, Pullup

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

VPU

(Note 2)

5.5

DS1340-18

1.3

3.7

DS1340-3

1.3

3.7

Backup Supply Voltage (Note 2)

VBACKUP

DS1340-33

1.3

5.5

(Notes 3, 4)

250

(Note 5)

2000

Trickle-Charge Current-Limiting

Resistors

(Note 6)

4000

DS1340-18

1.51

1.6

1.71

DS1340-3

2.45

2.6

2.7

Power-Fail Voltage (Note 2)

VPF

DS1340-33

2.70

2.88

2.97

Input Leakage (SCL, CLK)

ILI

-1

μA

I/O Leakage (SDA, FT/OUT)

ILO

-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

VCC > 2V; VOL = 0.4V

3.0

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

3.0

FT/OUT Logic 0 Output

IOLSQW

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

250

μA

DS1340-18; VCC = 1.89V

150

DS1340-3; VCC = 3.3V

108

200

Active Supply Current (Note 7)

ICCA

DS1340-33; VCC = 5.5V

192

300

μA

DS1340-18; VCC = 1.89V

100

DS1340-3; VCC = 3.3V

125

Standby Current (Note 8)

ICCS

DS1340-33; VCC = 5.5V

100

150

μA

VBACKUP Leakage Current

IBACKUPLKG VBACKUP = 3.7V

100

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