Digital Temperature Sensor and Thermal

Watchdog with 2-Wire Interface

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3

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

LOGIC (SDA, SCL, A0, A1, A2)

Input High Voltage

0.7

0.5

V

Input Low Voltage

-0.3

0.3

V

Input High Current

0.005

1.0

µA

Input Low Current

-1.0

-0.005

µA

Input Capacitance

All digital inputs

20

pF

Output High Current

10

µA

Output Low Voltage

0.4

V

(Clock) SCL Period

Bus timeout inactive

2.5

µs

Data In Setup Time to SCL High

10% of SDA to 10% of SCL

100

ns

Data Out Stable After SCL Low

10% of SCL to 10% of SDA

0

µs

Start Condition Setup Time

(SDA Low to SCL Low)

90% of SCL to 90% of SDA

100

ns

STOP Condition Hold Time

100

ns

SDA Time Low for Reset of Serial

Interface

(Note 14)

75

325

ms

ELECTRICAL CHARACTERISTICS (continued)

Note 4:

All parts operate properly over the 3V to 5.5V supply voltage range. The devices are tested and specified for rated

accuracy at their nominal supply voltage.

Note 5:

Note 6:

There is no industry-wide standard for temperature accuracy specifications. Maxim’s standard is 6-

σ. The 3-σ specifica-

tion is included to allow easier comparison to products built by manufacturers who use different standards.

Note 7:

This specification indicates how often temperature data is updated. The devices can be read at any time without regard to

conversion state, while yielding the last conversion result.

Note 8:

For best accuracy, minimize output loading. Higher sink currents can affect sensor accuracy due to internal heating.

Note 9:

OS delay is user programmable up to 6 over-limit conversions before OS is set to minimize false tripping in noisy environ-

ments.

Note 10: Guaranteed by design.

Note 11: Default values set at power-up.

Note 12: All timing specifications are guaranteed by design.

serial bus communication (SDA set high).