DS125BR401SQ Datasheet, PDF (9/52 Pages) Texas Instruments – Low-Power 12.5-Gbps 4-Lane Repeater With Input Equalization and Output De-Emphasis

DS125BR401
www.ti.com
SNLS419C – JULY 2012 – REVISED APRIL 2013
Electrical Characteristics — Serial Management Bus Interface
Over recommended operating supply and temperature ranges unless other specified.
Parameter
Test Conditions
Min
Typ
Max
Unit
SERIAL BUS INTERFACE DC SPECIFICATIONS
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
or Current Source
4
0.8
V
3.6
V
mA
V_DD
I_LEAK-Bus
I_LEAK-Pin
C_I
R_TERM
Nominal Bus Voltage
Input Leakage Per Bus Segment
Input Leakage Per Device Pin
Capacitance for SDA and SCL
External Termination Resistance
pull to V_DD = 2.5V ± 5% OR 3.3V ±
10%
See ⁽¹⁾
See ^{(1) (2)}
Pullup V_DD = 3.3V^(1)(2)(3)
Pullup V_DD = 2.5V^(1)(2)(3)
2.375
3.6
V
-200
+200
µA
-15
µA
10
pF
2000
Ω
1000
Ω
SERIAL BUS INTERFACE TIMING SPECIFICATIONS
FSMB
Bus Operating Frequency
ENSMB = VDD (Slave Mode)
400
kHz
ENSMB = FLOAT (Master Mode)
280
400
520
kHz
TBUF
Bus Free Time Between Stop and
Start Condition
1.3
µs
THD:STA
Hold time after (Repeated) Start
At I_PULLUP, Max
Condition. After this period, the first
0.6
µs
clock is generated.
TSU:STA
Repeated Start Condition Setup
Time
0.6
µs
TSU:STO
Stop Condition Setup Time
0.6
µs
THD:DAT
Data Hold Time
0
ns
TSU:DAT
Data Setup Time
100
ns
T_LOW
T_HIGH
t_F
t_R
t_POR
Clock Low Period
Clock High Period
Clock/Data Fall Time
Clock/Data Rise Time
Time in which a device must be
operational after power-on reset
See ⁽⁴⁾
See ⁽⁴⁾
See ⁽⁴⁾
See ^{(4) (5)}
1.3
µs
0.6
50
µs
300
ns
300
ns
500
ms
(1) Recommended value.
(2) Recommended maximum capacitance load per bus segment is 400pF.
(3) Maximum termination voltage should be identical to the device supply voltage.
(4) 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.
(5) ensured by Design. Parameter not tested in production.
Copyright © 2012–2013, Texas Instruments Incorporated
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