Rainbow-electronics DS1854 Manuel d'utilisateur télécharger pdf (Page 5)

DS1854

Dual Temperature-Controlled Resistors with

Two Monitors

_____________________________________________________________________ 5

AC ELECTRICAL CHARACTERISTICS (continued)

= 3.0V to 5.5V, T

= -40°C to +95°C, unless otherwise noted.)

Note 10: After this period, the first clock pulse is generated.

Note 11: The maximum t

HD:DAT

only has to be met if the device does not stretch the LOW period (t

LOW

) of the SCL signal.

Note 12: A device must internally provide a hold time of at least 300ns for the SDA signal (see the V

IH MIN

of the SCL signal) in

order to bridge the undefined region of the falling edge of SCL.

Note 13: C

—total capacitance of one bus line, timing referenced to 0.9 x V

and 0.1 x V

Note 14: EEPROM write begins after a STOP condition occurs.

Typical Operating Characteristics

= 5.0V, T

= +25°C, unless otherwise noted.)

ACTIVE SUPPLY CURRENT

vs. SCL FREQUENCY

DS1854 toc04

SCL FREQUENCY (kHz)

ACTIVE SUPPLY CURRENT (µA)

300200100

540

580

620

660

700

500

0 400

SDA = 5V

RESISTANCE vs. SETTING

DS1854 toc03

SETTING

RESISTANCE (kΩ)

25020015010050

0 300

SUPPLY CURRENT vs. VOLTAGE

DS1854 toc02

VOLTAGE (V)

SUPPLY CURRENT (µA)

5.04.54.03.5

450

500

550

600

650

700

400

3.0 5.5

SUPPLY CURRENT vs. TEMPERATURE

DS1854 toc01

TEMPERATURE (°C)

SUPPLY CURRENT (µA)

806040200-20

540

580

620

660

700

500

-40 100

1 2 3 4 5 6 7 8 9 10 ... 21 22

Two Monitors 1

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Rainbow-electronics DS1854 Manuel d'utilisateur Page 5

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