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TIMINGREQUIREMENTS
(1)
t
w
(
H
)
t
w
(
L
)
t
r
t
f
t
s
u
(
1
)
t
h
(
1
)
SCL
SDA
t
s
u
(
2
)
t
h
(
2
)
t
s
u
(
3
)
t
(
b
u
f
)
SCL
SDA
开始 情况
停止 情况
THS7313
SLOS483–NOVEMBER2005
V
S+
=2.7vto5v
STANDARDMODEFASTMODE
PARAMETERUNIT
MINMAXMINMAX
f
SCL
clockfrequency,scl01000400khz
t
w(h)
pulseduration,sclhigh40.6
µ
s
t
w(l)
pulseduration,scllow4.71.3
µ
s
t
r
risetime,sclandsda1000300ns
t
f
falltime,sclandsda300300ns
t
su(1)
setuptime,sdatoscl250100ns
t
h(1)
holdtime,scltosda00ns
t
(buf)
busfreetimebetweenstopandstartconditions4.71.3
µ
s
t
su(2)
setuptime,scltostartcondition4.70.6
µ
s
t
h(2)
holdtime,startconditiontoscl40.6
µ
s
t
su(3)
setuptime,scltostopcondition40.6
µ
s
C
b
Capacitiveloadforeachbusline400400pF
(1)theths7313i
2
caddress=01011(a1)(a0)(r/w).seetheapplicationinformationsectionformoreinformation.
figure2.sclandsdatiming
figure3.startandstopconditions
7
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