17
FN8111.0
March 28, 2005
A.C. CHARACTERISTICS
Note: (1) Cb = total capacitance of one bus line in pF.
TIMING DIAGRAMS
Bus Timing
Symbol Parameter
400kHz
UnitMin. Max.
f
SCL
SCL Clock Frequency 0 400 kHz
t
IN
Pulse width Suppression Time at inputs 50 ns
t
AA
SCL LOW to SDA Data Out Valid 0.1 0.9 µs
t
BUF
Time the bus free before start of new transmission 1.3 µs
t
LOW
Clock LOW Time 1.3 µs
t
HIGH
Clock HIGH Time 0.6 µs
t
SU:STA
Start Condition Setup Time 0.6 µs
t
HD:STA
Start Condition Hold Time 0.6 µs
t
SU:DAT
Data In Setup Time 100 ns
t
HD:DAT
Data In Hold Time 0 µs
t
SU:STO
Stop Condition Setup Time 0.6 µs
t
DH
Data Output Hold Time 50 ns
t
R
SDA and SCL Rise Time 20 +.1Cb
(1)
300 ns
t
F
SDA and SCL Fall Time 20 +.1Cb
(1)
300 ns
Cb Capacitive load for each bus line 400 pF
t
SU:STO
t
HIGH
t
SU:STA
t
HD:STA
t
HD:DAT
t
SU:DAT
SCL
SDA IN
SDA OUT
t
F
t
LOW
t
BUF
t
R
t
DH
t
AA
X40010, X40011, X40014, X40015
