MAX6654EVKIT【PDF 3/16 页】EVAL KIT FOR MAX6654

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MAX6654

1°C Accurate Remote/Local Temperature

Sensor with SMBus Serial Interface

ELECTRICAL CHARACTERISTICS (continued)

(V CC = +3V to +5.5V, T A = -55°C to +125°C, unless otherwise noted. Typical values are at V CC = +3.3V and T A = +25°C.)

PARAMETER

Logic Input Low Voltage

Logic Input High Voltage

SYMBOL

V IL

V IH

CONDITIONS

V CC = +3.0V to +5.5V

V CC = +3.0V

V CC = +5.5V

MIN

+2.2

+2.6

TYP

MAX

+0.8

UNITS

V

V

Input Leakage Current

Output Low Sink Current

I LEAK

I OL

V IN = GND or V CC

V OL = +0.6V

V OL = +0.4V

+6

+1

± 2

μA

mA

Input Capacitance

Output High Leakage Current

C in

V OH = +5.5V

+5

+1

pF

μA

Serial Clock Frequency

Bus Free Time Between STOP

and START Conditions

f SCL

t BUF

(Note 4)

0

+4.7

+125

kHz

μs

START Condition Setup Time

+4.7

μs

Repeat START Condition Setup

Time

START Condition Hold Time

STOP Condition Setup Time

Clock Low Period

Clock High Period

Data Setup Time

Data Hold Time

Receive SCL/SDA Rise Time

Receive SCL/SDA Fall Time

t SU:STA

t HD:STA

t SU:STO

t LOW

t HIGH

t SU: DAT

t HD: DAT

t R

t F

90% to 90%

10% of SMBDATA to 90% of SMBCLK

90% of SMBCLK to 10% of SMBDATA662

10% to 10%

90% to 90%

90% of SMBDATA to 10% of SMBCLK

(Note 5)

+50

+4

+4

+4.7

+4

+250

0

+1

+300

μs

μs

μs

μs

μs

ns

μs

μs

ns

SMBus Timeout

t TIMEOUT

SMBDATA and SMBCLK time low for reset

of serial interface

+25

+40

ms

Note 1: +25 ° C ≤ T A ≤ +85 ° C.

Note 2: If both the MAX6654 and the remote junction are below T A = -20 ° C, then V CC > 3.15V.

Note 3: The conversion time doubles for the extended resolution mode. This causes the average operating current to approximately

double.

Note 4: The serial interface resets when SMBCLK is low for more than t TIMEOUT .

Note 5: Note that a transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK’s

falling edge.

Maxim Integrated

3

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