DS1221 Datasheet

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DS1221

ABSOLUTE MAXIMUM RATINGS*

Voltage on Any Pin Relative to Ground

Operating Temperature

Storage Temperature

Soldering Temperature

Short Circuit Output Current

*

-0.3V to +7.0V

0掳C to 70掳C

-55掳C to +125掳C

260掳C for 10 seconds

20 mA

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

PARAMETER

Supply Voltage

Logic 1 Input

Logic 0 Input

Battery Input

SYMBOL

V

CCI

V

IH

V

IL

V

BAT1

,

V

BAT2

MIN

4.5

2.2

-0.3

2.0

TYP

5.0

MAX

5.5

V

CC

+0.3

+0.8

4.0

(0掳C to 70掳C)

UNITS

V

V

V

V

NOTES

1

1

1

1, 2

DC ELECTRICAL CHARACTERISTICS

PARAMETER

Supply Current

Supply Voltage

Supply Current

Input Leakage

Output Leakage

CE0

-

CE3

, DQ

Output @ 2.4V

CE0

-

CE3

, DQ

Output @ 0.4V

V

CC

Trip Point

SYMBOL

I

CCI

V

CCO

I

CCO1

I

IL

I

LO

I

OH

I

OL

V

CCTP

4.25

MIN

V

CC

-0.2

-1.0

-1.0

-1.0

(0掳C to 70掳C; V

CC

= 4.5 to 5.5V)

TYP

MAX

5

80

+1.0

+1.0

UNITS

mA

V

mA

碌A

碌A

mA

mA

V

NOTES

3

1

4, 10

5

5

1

4.0

4.37

4.50

(0掳C to 70掳C; V

CC

< 4.25V)

PARAMETER

CE0

-

CE3

Output

V

BAT1

or V

BAT2

Battery Current

Battery Backup Current

@ V

CCO

= V

BAT

- 0.5V

SYMBOL

V

OHL

I

BAT

I

CCO2

MIN

V

CC

-0.2

V

BAT

-0.2

TYP

MAX

0.1

100

UNITS

V

碌A

碌A

NOTES

3

6, 7, 10

4 of 8

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