DS568F1
15
CS4398
SWITCHING CHARACTERISTICS - CONTROL PORT - IC FORMAT
(Inputs: Logic 0 = GND, Logic 1 = VLC, CL =20pF)
10. Data must be held for sufficient time to bridge the transition time, tfc, of SCL.
Parameter
Symbol
Min
Max
Unit
SCL Clock Frequency
fscl
-
100
kHz
RST Rising Edge to Start
tirs
500
-
ns
Bus Free-Time Between Transmissions
tbuf
4.7
-
s
Start Condition Hold Time (prior to first clock pulse)
thdst
4.0
-
s
Clock Low Time
tlow
4.7
-
s
Clock High Time
thigh
4.0
-
s
Setup Time for Repeated Start Condition
tsust
4.7
-
s
SDA Hold Time from SCL Falling
(Note 10)
thdd
0-
s
SDA Setup Time to SCL Rising
tsud
250
-
ns
Rise Time of SCL and SDA
trc, trd
-1
s
Fall Time SCL and SDA
tfc, tfd
-300
ns
Setup Time for Stop Condition
tsusp
4.7
-
s
Acknowledge Delay from SCL Falling
tack
300
1000
ns
t buf
t
hd st
t
lo w
t
hdd
t
hig h
t sud
Stop
S t a rt
SDA
SC L
t
irs
RS T
t
hd st
t
rc
t
fc
t sust
t susp
St a rt
Sto p
R epe a t e d
t
rd
t
fd
t ack
Figure 8. Control Port Timing - IC Format
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