DS1321

6 of 12

ABSOLUTE MAXIMUM RATINGS*

Voltage on Any Pin Relative to Ground

-0.5V to +7.0V

Operating Temperature

-40

°C to +85°C

Storage Temperature

-55

°C to +125°C

Soldering Temperature

260

°C for 10 seconds

* This is a stress rating only and functional operation of the device at these or any other conditions

above those indicated in the operation sections of this specification is not implied. Exposure to

absolute maximum rating conditions for extended periods of time may affect reliability.

RECOMMENDED DC OPERATING CONDITIONS

(-40°C to +85°C)

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Supply Voltage TOL=GND

4.75

5.0

5.5

V

1

4.5

5.0

5.5

V

1

Battery Supply Voltage

2.0

3.0

6.0

V

1

Logic 1 Input

2.0

V

1, 12

Logic 0 Input

-0.3

+0.8

V

1, 12

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Operating Current (TTL inputs)

1

1.5

mA

2

Operating Current (CMOS inputs)

100

150

µA

2, 5

RAM Supply Voltage

-0.2

V

1

RAM Supply Current

185

mA

3

Supply Current

260

mA

4

4.50

4.62

4.75

V

1

4.25

4.37

4.50

V

1

2.50

2.6

2.70

V

1

Output Current @ 2.2V

-1

mA

7, 10

Output Current @ 0.4V

4

mA

7, 10

Input Leakage

-1.0

+1.0

µA

Output Leakage

-1.0

+1.0

µA

Battery Monitoring Test Load

0.8

1.2

1.5

MΩ

DC ELECTRICAL CHARACTERISTICS

PARAMETER

SYMBOL

MIN

TYP

MAX

UNITS

NOTES

Battery Current

100

nA

2

Battery Backup Current

500

µA

6

Supply Voltage

V

1

CEO

Output

V

1, 8