Rainbow-electronics MAX6635 Instrukcja Użytkownika Pobierz pdf (Strona 3)

MAX6633/MAX6634/MAX6635

12-Bit Plus Sign Temperature Sensors with

SMBus/I

C-Compatible Serial Interface

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ELECTRICAL CHARACTERISTICS (continued)

= +3.0V to +5.5V, T

= -55°C to +125°C, unless otherwise noted. Typical values are V

= +3.3V, T

= +25°C, unless other-

wise noted.)

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.

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

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

Serial Clock Frequency f

SCL

10 100 kHz

Bus Free Time Between STOP

and START Condition

BUF

4.7 µs

START Condition Setup Time 4.7 µs

Repeat START Condition Setup

Time

SU:STA

90% to 90% 4.7 µs

START Condition Hold Time t

HD:STA

10% of SMBDATA to 90% of SMBCLK 4 µs

STOP Condition Setup Time t

SU:STO

90% of SMBCLK to 10% of SMBDATA 4 µs

Data Setup Time t

SU:DAT

90% of SMBDATA to 10% of SMBCLK 250 ns

Data Hold Time (Note 4) t

HD:DAT

300 ns

Receive SCL/SDA Rise Time t

1µs

SCL/SDA Fall Time (Note 4) t

300 ns

Clock Low Period t

LOW

10% to 10% 4.7 µs

Clock High Period t

HIGH

90% to 90% 4 µs

SMBus Timeout 25 48 ms

1 2 3 4 5 6 7 8 ... 15 16

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