Datasheet

SP
t
BUF
t
HD:STA
t
LOW
t
R
t
HD:DAT
t
HIGH
t
F
t
SU:DAT
t
SU:STA
ST
SP
t
SU:STO
SCK
SDA
SMB_CS
t
SU:CS
ST
LMH0040, LMH0050
LMH0070, LMH0340
www.ti.com SNLS271I –APRIL 2007–REVISED APRIL 2013
SMBus Switching Characteristics
Over supply and Operating Temperature ranges unless otherwise specified.
(1)
Symbol Parameter Condition Min Typ Max Units
f
SMB
Bus Operating Frequency 10 100 kHz
t
BUF
Bus free time between stop and start 4.7 μs
condition
t
HD:STA
Hold time after (repeated) start At I
SPULLUP
= MAX 4.0 μs
condition. After this period, the first
clock is generated
t
SU:STA
Repeated Start condition setup time 4.7 μs
t
SU:STO
Stop Condition setup time 4.0 μs
t
HD:DAT
Data hold time 300 ns
t
SU:DAT
Data setup time 250 ns
t
LOW
Clock Low Time 4.7 μs
t
HIGH
Clock High Time 4.0 50 μs
t
F
Clock/data fall time 20% to 80% 300 ns
t
R
Clock/data rise time 1000 ns
t
SU:CS
SMB_CS setup time 30 ns
t
POR
Time in which a device must be 500 ms
operational after power on
(1) Typical Parameters measured at V
DD3V3
=3.3V, V
DD2V5
=2.5V, T
A
=25°C. They are for reference purposes and are not production tested.
NOTE: (levels are V
SIL
and V
SIH
)
Figure 4. SMBus Timing Parameters
SDI Output Characteristics — LMH0340 / LMH0040 / LMH0070
Over supply and Operating Temperature ranges unless otherwise specified.
(1)
Symbol Parameter Condition Min Typ Max Units
V
OD
SDI Output Voltage into 75Ω load 720 800 880 mV
DR SDI Output Datarate LMH0340 270 2,970 Mbps
LMH0040 270 1,485 Mbps
LMH0070 270 Mbps
t
r
SDI Output Rise Time 2.97 Gbps 90 135 ps
1.485 Gbps 90 220 ps
<1.485 Gbps 400 700 1000 ps
t
f
SDI Output Fall Time 2.97 Gbps 90 135 ps
1.485 Gbps 90 220 ps
<1.485 Gbps 400 700 1000 ps
(1) Typical Parameters measured at V
DD3V3
=3.3V, V
DD2V5
=2.5V, T
A
=25°C. They are for reference purposes and are not production tested.
Copyright © 2007–2013, Texas Instruments Incorporated Submit Documentation Feedback 7
Product Folder Links: LMH0040 LMH0050 LMH0070 LMH0340