MAX6635 查看數據表（PDF） - Maxim Integrated

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MAX6635

12-Bit Plus Sign Temperature Sensors with SMBus/I2C-Compatible Serial Interface

Maxim Integrated 

MAX6633/MAX6634/

MAX6635

12-Bit Plus Sign Temperature Sensors

with SMBus/I2C-Compatible Serial Interface

Electrical Characteristics (continued)

(VCC = +3.0V to +5.5V, TA = -55°C to +125°C, unless otherwise noted. Typical values are VCC = +3.3V, TA = +25°C, unless other-

wise noted.)

PARAMETER

SYMBOL

SMBus TIMING (Note 3) (Figures 1, 2, and 3)

Serial Clock Frequency

fSCL

Bus Free Time Between STOP

and START Condition

tBUF

CONDITIONS

MIN TYP MAX UNITS

10

100

kHz

4.7

µs

START Condition Setup Time

4.7

µs

Repeat START Condition Setup

Time

tSU:STA 90% to 90%

4.7

µs

START Condition Hold Time

tHD:STA 10% of SMBDATA to 90% of SMBCLK

4

STOP Condition Setup Time

tSU:STO 90% of SMBCLK to 10% of SMBDATA

4

Data Setup Time

tSU:DAT 90% of SMBDATA to 10% of SMBCLK

250

Data Hold Time (Note 4)

tHD:DAT

300

Receive SCL/SDA Rise Time

tR

SCL/SDA Fall Time (Note 4)

tF

Clock Low Period

tLOW

10% to 10%

4.7

Clock High Period

tHIGH 90% to 90%

4

SMBus Timeout

25

µs

µs

ns

ns

1

µs

300

ns

µs

µs

48

ms

Note 1: Guaranteed by design and characterization.

Note 2: Peak operating current measured during conversion. See Figure 4.

Note 3: Guaranteed by design, not production tested.

Note 4: A master device must provide a hold time of at least 300ns for the SDA signal in order to bridge the undefined region of

SCL’s falling edge.

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