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SLUS761D

– DECEMBER 2007 – REVISED OCTOBER 2011

ELECTRICAL CHARACTERISTICS (continued)

7 V

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

IVDDSMB_Iq

VDDSMB quiescent current

20

27

μA

85

°C

ELECTRICAL CHARACTERISTICS

7 Vdc

(1)

PARAMETER

MIN

TYP

MAX

UNIT

[SMB TIMING SPECIFICATION (VDD = 2.7 V to 5.5 V) (see Figures 4 and 5)]

SMBus TIMING CHARACTERISTICS

SCLK/SDATA rise time

1

μs

SCLK/SDATA fall time

300

ns

SCLK pulse duration high

4

50

μs

SCLK pulse duration low

4.7

μs

Setup time for START condition

4.7

μs

START condition hold time after which first clock pulse is generated

4

μs

Data setup time

250

ns

Data hold time

300

ns

Setup time for STOP condition

4

μs

Bus free time between START and STOP condition

4.7

μs

Clock frequency

10

100

kHz

HOST COMMUNICATION FAILURE

SMBus bus release timeout

22

25

35

ms

Watchdog timeout period

140

170

210

s

OUTPUT BUFFER CHARACTERISTICS

0.4

V

(1)

Devices participating in a transfer time out when any clock low exceeds the 2- ms minimum time-out period. Devices that have detected

a time-out condition must reset the communication no later than the 35-ms maximum timeout period. Both a master and a slave must

adhere to the maximum value specified, as it incorporates the cumulative stretch limit for both a master (10 ms) and a slave (25 ms).

Copyright

© 2007–2011, Texas Instruments Incorporated

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