BQ4050 Datasheet, PDF (18/53 Pages) Texas Instruments – CEDV Gas Gauge and Protection Solution

bq4050
SLUSC67A – MARCH 2016 – REVISED MARCH 2016
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6.34 Timing Requirements: SMBus XL
Typical values stated where T_A = 25°C and VCC = 14.4 V, Min/Max values stated where T_A = –40°C to 85°C and VCC =
2.2 V to 26 V (unless otherwise noted)
MIN
NOM
MAX UNIT
f_SMBXL
SMBus XL operating
frequency
SLAVE mode
40
400 kHz
t_BUF
Bus free time between start
and stop
4.7
µs
t_HD(START)
t_SU(START)
t_SU(STOP)
t_TIMEOUT
t_LOW
t_HIGH
Hold time after (repeated) start
Repeated start setup time
Stop setup time
Error signal detect time
Clock low period
Clock high period
4.0
µs
4.7
µs
4.0
µs
5
20 ms
20 µs
20 µs
tSU(STOP)p
SMBC
TtR
TtBUFT
TtF
tHD(START)
SMBC
TtHIGHT
TtF
TtR
TtLOWT
SMBD
SMBC
SMBD
P
S
Start and Stop Condition
TtTIMEOUT
SMBD
SMBC
tHD(DATA)T
Wait and Hold Condition
tSU(START)T
TtSU(DATA)
SMBD
Timeout Condition
S
Repeated Start Condition
Figure 4. SMBus Timing Diagram
18
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