Technical Note
BU2098F, BU2090F, BU2090FS
【BU2098F】
●AC characteristics (Unless otherwise noted, VDD=5V, VSS=0V, Ta=25℃)
Fast mode I2C BUS
Standard mode I2C BUS
Parameter
Symbol
Unit
Min.
Max.
Min.
0
Max.
SCL clock frequency
fSCL
tBUS
0
400
100
kHz
μs
μs
μs
μs
μs
μs
ns
ns
ns
μs
pF
Bus free time between start-stop condition
Hold time start condition
1.3
-
4.7
4.0
4.7
4.0
4.7
0
-
tHD:STA
tLOW
tHIGH
tSU:STA
tHD:DAT
tSU:DAT
tR
0.6
-
-
Low period of the SCL clock
High period of the SCL clock
Set up time Re-start condition
Data hold time
1.3
-
-
-
0.6
-
0.6
-
-
-
0
100
0.9
-
Data set up time
250
-
-
Rise time of SDA and SCL
Fall time of SDA and SCL
Set up time stop condition
Capacitive load for SDA line and SCL line
20+0.1Cb
20+0.1Cb
0.6
300
300
-
1000
300
-
tF
-
tSU:STO
Cb
4.0
-
-
400
400
●Timing chart
SDA
tBUS
tHD:STA
tf
tLOW
tr
SCL
tHD:STA
tSU:STO
Sr
P
S
tHD:DAT
tSU:DAT
tSU:STA
P
Fig.1 SDA, SCL timing chart
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2009.06 - Rev.A
5/12
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