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BQ20Z90-V110 Datasheet(PDF) 7 Page - Texas Instruments

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Part No. BQ20Z90-V110
Description  SBS 1.1-COMPLIANT GAS GAUGE ENABLED WITH IMPEDANCE TRACK TECHNOLOGY FOR USE WITH THE bq29330
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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BQ20Z90-V110 Datasheet(HTML) 7 Page - Texas Instruments

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SMBus TIMING SPECIFICATIONS
bq20z90-V110
SLUS743 – NOVEMBER 2006
V
CC = 2.4 V to 2.6 V, TA = –40°C to 85°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
fSMB
SMBus operating frequency
Slave mode, SMBC 50% duty cycle
10
100
kHz
fMAS
SMBus master clock frequency
Master mode, no clock low slave extend
51.2
tBUF
Bus free time between start and stop
4.7
tHD:STA
Hold time after (repeated) start
4
µs
tSU:STA
Repeated start setup time
4.7
tSU:STO
Stop setup time
4
Receive mode
0
tHD:DAT
Data hold time
Transmit mode
300
ns
tSU:DAT
Data setup time
250
tTIMEOUT
Error signal/detect
See (1)
25
35
ms
tLOW
Clock low period
4.7
µs
tHIGH
Clock high period
See (2)
4
50
tLOW:SEXT
Cumulative clock low slave extend time
See (3)
25
ms
tLOW:MEXT
Cumulative clock low master extend time
See (4)
10
tF
Clock/data fall time
(VILMAX– 0.15 V) to (VIHMIN + 0.15 V)
300
ns
tR
Clock/data rise time
0.9 VCC to (VILMAX – 0.15 V)
1000
(1)
The bq20z90-V110 times out when any clock low exceeds tTIMEOUT.
(2)
tHIGH:MAX. is minimum bus idle time. SMBC = 1 for t > 50 µs causes reset of any transaction involving the bq20z90-V110 that is in
progress.
(3)
tLOW:SEXT is the cumulative time a slave device is allowed to extend the clock cycles in one message from initial start to the stop.
(4)
tLOW:MEXT is the cumulative time a master device is allowed to extend the clock cycles in one message from initial start to the stop.
SMBus TIMING DIAGRAM
7
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