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MAX6642

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

Maxim Integrated 

MAX6642

±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

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

Serial Clock Frequency

fSCLK (Note 3)

Bus Free Time Between STOP

and START Condition

tBUF

START Condition Setup Time

MIN TYP MAX UNITS

0.8

V

2.2

V

-1

+1

µA

6

mA

5

pF

100

kHz

4.7

µs

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

Receive SCLK/SDA Rise Time

Receive SCLK/SDA Fall Time

Pulse Width of Spike Suppressed

SMBus Timeout

tSU:STA 90% to 90%

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

50

ns

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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