BQ29312_15 Datasheet, PDF (6/39 Pages) Texas Instruments – FOUR CELL LITHIUM-ION

bq29312
SLUS546E – MARCH 2003 – REVISED MARCH 2005
AC ELECTRICAL CHARACTERISTICS
T_A = 25°C, C_(REG) = 4.7 µF, BAT = 14 V (unless otherwise noted)
PARAMETER
TEST CONDITION
t_(WDTINT) WDT start-up detect time
t_(WDWT) WDT detect time
AC TIMING SPECIFICATIONS (I²C COMPATIBLE SERIAL INTERFACE)
t_r
t_f
t_w(H)
t_w(L)
t_su(STA)
t_h(STA)
t_su(DAT)
t_h(DAT)
t_su(STOP)
t_su(BUF)
t_V
t_h(CH)
f_SCL
PARAMETER
SCLK SDATA rise time
SCLK SDAT fall time
SCLK pulse width high
SCLK pulse width low
Setup time for START condition
START condition hold time after which first clock pulse is generated
Data setup time
Data hold time
Setup time for STOP condition
Time the bus must be free before new transmission can start
Clock low to data out valid
Data out hold time after clock low
Clock frequency
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MIN NOM MAX UNIT
250 700 2000 ms
100
µs
MIN
MAX UNIT
1000
ns
300
ns
4.0
µs
4.7
µs
4.7
µs
4.0
µs
250
ns
0
µs
4.0
µs
4.7
µs
900
ns
0
ns
0
100
kHz
t_su(STA)
SCLK
t_w(H)
SDATA
Start
Condition
t_h(STA)
SDA
Input
t_h(DAT)
t_w(L)
t_f
t_r
t_r
t_f
SDA
Change
t_su(DAT)
Stop
Condition
t_h(ch)
SCLK
SDATA
SCLK
SDATA
1
2
3
MSB
Start Condition
1
2
3
MSB
7
8
9
t_v
7
ACK
t_su(STOP)
8
9
ACK
Stop Condition
t_su(BUF)
6