7-Channel Precision Temperature Monitor

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3

ELECTRICAL CHARACTERISTICS (continued)

+25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

SMBus INTERFACE (SCL, SDA),

STBY

Logic-Input Low Voltage

0.8

V

2.2

Logic-Input High Voltage

2.4

V

Input Leakage Current

-1

+1

µA

Output Low Voltage

0.3

V

Input Capacitance

5pF

SMBus-COMPATIBLE TIMING (Figures 3 and 4) (Note 2)

Serial-Clock Frequency

(Note 3)

400

kHz

4.7

Bus Free Time Between STOP

and START Condition

1.6

µs

4.7

START Condition Setup Time

0.6

µs

90% of SCL to 90% of SDA,

0.6

Repeat START Condition Setup

Time

90% of SCL to 90% of SDA,

0.6

µs

START Condition Hold Time

10% of SDA to 90% of SCL

0.6

µs

90% of SCL to 90% of SDA,

4

STOP Condition Setup Time

90% of SCL to 90% of SDA,

0.6

µs

1.3

Clock-Low Period

1.3

µs

Clock-High Period

90% to 90%

0.6

µs

300

Data Hold Time

900

ns

250

Data Setup Time

100

ns

1

Receive SCL/SDA Rise Time

0.3

µs

Receive SCL/SDA Fall Time

300

ns

Pulse Width of Spike Suppressed

050

ns

SMBus Timeout

SDA low period for interface reset

25

37

45

ms

Note 2: Timing specifications are guaranteed by design.

Note 4: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SCL’s falling edge.