MAX6642(2003) 查看數據表（PDF） - Maxim Integrated

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MAX6642
(Rev.:2003)

±1°C, SMBus-Compatible Remote/Local Temperature Sensor with Overtemperature Alarm

Maxim Integrated 

±1°C, SMBus-Compatible Remote/Local

Temperature Sensor with Overtemperature Alarm

ELECTRICAL CHARACTERISTICS (continued)

(VCC = +3.0V to +5.5V, TA = -40°C to +125°C, unless otherwise specified. Typical values are at VCC = +3.3V and TA = +25°C.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN TYP MAX UNITS

SMBus-COMPATIBLE INTERFACE (SCLK and SDA)

Logic Input Low Voltage

Logic Input High Voltage

Input Leakage Current

Output Low Sink Current

Input Capacitance

SMBus TIMING (Note 2)

VIL

VIH

ILEAK

IOL

CIN

VCC = 3.0V

VIN = GND or 5.5V

VOL = 0.6V

0.8

V

2.2

V

-1

+1

µA

6

mA

5

pF

Serial Clock Frequency

fSCLK (Note 3)

100

kHz

Bus Free Time Between STOP

and START Condition

tBUF

4.7

µs

START Condition Setup Time

4.7

µs

Repeat START Condition Setup

Time

tSU:STA 90% to 90%

50

ns

START Condition Hold Time

STOP Condition Setup Time

Clock Low Period

Clock High Period

Data Setup Time

Receive SCLK/SDA Rise Time

Receive SCLK/SDA Fall Time

Pulse Width of Spike Suppressed

SMBus Timeout

tHD:STA

tSU:STO

tLOW

tHIGH

tHD:DAT

tR

tF

tSP

tTIMEOUT

10% of SDA to 90% of SCLK

90% of SCLK to 90% of SDA

10% to 10%

90% to 90%

(Note 4)

SDA low period for interface reset

4

µs

4

µs

4.7

µs

4

µs

250

µs

1

µs

300

ns

0

50

ns

20

28

40

ms

Note 1: All parameters tested at TA = +25°C. Specifications over temperature are guaranteed by design.

Note 2: Timing specifications guaranteed by design.

Note 3: The serial interface resets when SCLK is low for more than tTIMEOUT.

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

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