DS100BR111A Datasheet, PDF (9/35 Pages) Texas Instruments – Ultra Low Power 10.3 Gbps 2-Channel Repeaters with Input Equalization and Output De-Emphasis

Electrical Characteristics — Serial Management Bus Interface
Over recommended operating supply and temperature ranges unless other specified.
Symbol
Parameter
Conditions
Min
Typ
SERIAL BUS INTERFACE DC SPECIFICATIONS: (Note 11)
V_IL
Data, Clock Input Low Voltage
V_IH
Data, Clock Input High Voltage
2.1
I_PULLUP
Current Through Pull-Up Resistor High Power Specification
4
or Current Source
V_DD
I_LEAK-Bus
C_I
R_TERM
Nominal Bus Voltage
Input Leakage Per Bus Segment (Note 8)
Capacitance for SDA and SCL (Note 8, Note 9, Note 12)
External Termination Resistance Pullup V_DD = 3.3V,
pull to V_DD = 2.5V ± 5% OR 3.3V ± (Note 8, Note 9, Note 10)
10%
Pullup V_DD = 2.5V,
(Note 8, Note 9, Note 10)
2.375
-200
2000
1000
SERIAL BUS INTERFACE TIMING SPECIFICATIONS
FSMB
Bus Operating Frequency
ENSMB = VDD (Slave Mode)
ENSMB = FLOAT (Master Mode)
(Note 7)
280
400
TBUF
Bus Free Time Between Stop and
1.3
Start Condition
THD:STA
Hold time after (Repeated) Start At I_PULLUP, Max
Condition. After this period, the first
0.6
clock is generated.
TSU:STA
Repeated Start Condition Setup
0.6
Time
TSU:STO Stop Condition Setup Time
0.6
THD:DAT Data Hold Time
0
TSU:DAT Data Setup Time
100
T_LOW
Clock Low Period
1.3
T_HIGH
Clock High Period
(Note 11)
0.6
t_F
Clock/Data Fall Time
(Note 11)
t_R
Clock/Data Rise Time
(Note 11)
t_POR
Time in which a device must be (Note 11, Note 12)
operational after power-on reset
Max
0.8
3.6
3.6
+200
10
400
520
50
300
300
500
Units
V
V
mA
V
µA
pF
Ω
Ω
kHz
kHz
µs
µs
µs
µs
ns
ns
µs
µs
ns
ns
ms
Note 7: EEPROM interface requires 400 KHz capable EEPROM device.
Note 8: Recommended value.
Note 9: Recommended maximum capacitance load per bus segment is 400pF.
Note 10: Maximum termination voltage should be identical to the device supply voltage.
Note 11: Compliant to SMBus 2.0 physical layer specification. See System Management Bus (SMBus) Specification Version 2.0, section 3.1.1 SMBus common
AC specifications for details.
Note 12: Guaranteed by Design. Parameter not tested in production.
Note 13: Parameter not tested in production.
Note 14: Default VOD used for testing. DE = -1.5 dB level used to compensate for fixture attenuation.
9
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