Datasheet

DS90UR916Q
www.ti.com SNOSB46E –MARCH 2011–REVISED APRIL 2013
Recommended Timing for the Serial Control Bus
Over +3.3V supply and temperature ranges unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
f
SCL
SCL Clock Frequency Standard Mode >0 100 kHz
Fast Mode >0 400 kHz
t
LOW
SCL Low Period Standard Mode 4.7 us
Fast Mode 1.3 us
t
HIGH
SCL High Period Standard Mode 4.0 us
Fast Mode 0.6 us
t
HD;STA
Hold time for a start or a Standard Mode 4.0 us
repeated start condition,
Fast Mode
0.6 us
Figure 13
t
SU:STA
Set Up time for a start or a Standard Mode 4.7 us
repeated start condition,
Fast Mode
0.6 us
Figure 13
t
HD;DAT
Data Hold Time, Figure 13 Standard Mode 0 3.45 us
Fast Mode 0 0.9 us
t
SU;DAT
Data Set Up Time, Figure 13 Standard Mode 250 ns
Fast Mode 100 ns
t
SU;STO
Set Up Time for STOP Standard Mode 4.0 us
Condition, Figure 13
Fast Mode 0.6 us
t
BUF
Bus Free Time Between STOP Standard Mode 4.7 us
and START, Figure 13
Fast Mode 1.3 us
t
r
SCL & SDA Rise Time, Standard Mode 1000 ns
Figure 13
Fast Mode 300 ns
t
f
SCL & SDA Fall Time, Standard Mode 300 ns
Figure 13
Fast mode 300 ns
DC and AC Serial Control Bus Characteristics
Over 3.3V supply and temperature ranges unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Units
V
IH
Input High Level SDA and SCL 2.2 V
DDIO
V
V
IL
Input Low Level Voltage SDA and SCL GND 0.8 V
V
HY
Input Hysteresis >50 mV
V
OL
SDA, IOL = 1.25mA 0 0.4 V
I
in
SDA or SCL, Vin = V
DDIO
or GND -15 +15 µA
t
R
SDA RiseTime – READ SDA, RPU = X, Cb ≤ 400pF 40 ns
t
F
SDA Fall Time – READ 25 ns
t
SU;DAT
Set Up Time — READ 520 ns
t
HD;DAT
Hold Up Time — READ 55 ns
t
SP
Input Filter 50 ns
C
in
Input Capacitance SDA or SCL <5 pF
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