DS1302 datasheet(10/16 Pages) DALLAS

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DS1302 Trickle-Charge Timekeeping Chip

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ABSOLUTE MAXIMUM RATINGS

Voltage Range on Any Pin Relative to Ground……………………………………………………………….-0.5Vto +7.0V

Operating Temperature Range, Commercial………………………………………………………………….0°C to +70°C

Operating Temperature Range, Industrial (IND)……………………………………………………………-40°C to +85°C

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

Soldering Temperature (leads, 10 seconds)………………………………………………………………..………….260°C

Soldering Temperature (surface mount)………………………………………………..…….See IPC/JEDEC J-STD-020

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 the absolute maximum rating conditions for extended periods may affect device reliability.

RECOMMENDED DC OPERATING CONDITIONS

(TA = 0°C to +70°C or TA = -40°C to +85°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage VCC1, VCC2

VCC1,

VCC2

(Notes 2, 10)

2.0

3.3

5.5

Logic 1 Input

VIH

(Note 2)

2.0

VCC +

0.3

VCC = 2.0V

-0.3

+0.3

Logic 0 Input

VIL

VCC = 5V

(Note 2)

-0.3

+0.8

DC ELECTRICAL CHARACTERISTICS

(TA = 0°C to +70°C or TA = -40°C to +85°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Input Leakage

ILI

(Notes 5, 13)

500

µA

I/O Leakage

ILO

(Notes 5, 13)

500

µA

Logic 1 Output (IOH = -0.4mA)

VCC = 2.0V

1.6

Logic 1 Output (IOH = -1.0mA)

VOH

VCC = 5V

(Note 2)

2.4

Logic 0 Output (IOL = 1.5mA)

VCC = 2.0V

0.4

Logic 0 Output (IOL = 4.0mA)

VOL

VCC = 5V

(Note 2)

0.4

VCC1 = 2.0V

0.4

Active Supply Current

(Oscillator Enabled)

ICC1A

VCC1 = 5V

CH = 0

(Notes 4, 11)

1.2

VCC1 = 2.0V

0.2

0.3

Timekeeping Current

(Oscillator Enabled)

ICC1T

VCC1 = 5V

CH = 0

(Notes 3, 11,13)

0.45

µA

VCC1 = 2.0V

100

VCC1 = 5V

100

Standby Current (Oscillator

Disabled)

ICC1S

IND

CH = 1

(Notes 9, 11, 13)

200

VCC2 = 2.0V

0.425

Active Supply Current

(Oscillator Enabled)

ICC2A

VCC2 = 5V

CH = 0

(Notes 4, 12)

1.28

VCC2 = 2.0V

25.3

Timekeeping Current

(Oscillator Enabled)

ICC2T

VCC2 = 5V

CH = 0

(Notes 3, 12)

µA

VCC2 = 2.0V

CH = 1

(Notes 9, 12)

Standby Current (Oscillator

Disabled)

ICC2S

VCC2 = 5V

µA

Trickle-Charge Resistors

Ω

Trickle-Charge Diode Voltage

Drop

VTD

0.7

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