National Products DS90C3202 - Manual (Page 6)

Two-Wire Serial Communication Interface
Over recommended operating supply and temperature ranges unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
f
SC
S2CLK Clock Frequency 400 kHz
SC:LOW Clock Low Period R
P
= 4.7K Ω, C
L
= 50pF 1.5 us
SC:HIGH Clock High Period R
P
= 4.7K Ω, C
L
= 50pF 0.6 us
SCD:TR S2CLK and S2DAT Rise Time R
P
= 4.7K Ω, C
L
= 50pF 0.3 us
SCD:TF S2CLK and S2DAT Fall Time R
P
= 4.7K Ω, C
L
= 50pF 0.3 us
SU:STA Start Condition Setup Time R
P
= 4.7K Ω, C
L
= 50pF 0.6 us
HD:STA Start Condition Hold Time R
P
= 4.7K Ω, C
L
= 50pF 0.6 us
HD:STO Stop Condition Hold Time R
P
= 4.7K Ω, C
L
= 50pF 0.6 us
SC:SD Clock Falling Edge to Data R
P
= 4.7K Ω, C
L
= 50pF 0 us
SD:SC Data to Clock Rising Edge R
P
= 4.7K Ω, C
L
= 50pF 0.1 us
SCL:SD S2CLK Low to S2DAT Data
Valid
R
P
= 4.7K Ω, C
L
= 50pF 0.1 0.9 us
BUF Bus Free Time R
P
= 4.7K Ω, C
L
= 50pF 13 us
AC Timing Diagrams
20147122
FIGURE 1. Two-Wire Serial Communication Interface Timing Diagram
DS90C3202
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