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BQ29312 Datasheet(PDF) 6 Page - Texas Instruments |
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BQ29312 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 33 page bq29312 SLUS546D − MARCH 2003 − REVISED SEPTEMBER 2004 www.ti.com 6 AC ELECTRICAL CHARACTERISTICS TA = 25°C, C(REG) = 4.7 µF, BAT = 14 V (unless otherwise noted) PARAMETER TEST CONDITION MIN NOM MAX UNIT t(WDTINT) WDT start-up detect time 250 700 2000 ms t(WDWT) WDT detect time 100 µs AC TIMING SPECIFICATIONS (I2C COMPATIBLE SERIAL INTERFACE) PARAMETER MIN MAX UNIT tr SCLK SDATA rise time 1000 ns tf SCLK SDAT fall time 300 ns tw(H) SCLK pulse width high 4.0 µs tw(L) SCLK pulse width low 4.7 µs tsu(STA) Setup time for START condition 4.7 µs th(STA) START condition hold time after which first clock pulse is generated 4.0 µs tsu(DAT) Data setup time 250 ns th(DAT) Data hold time 0 µs tsu(STOP) Setup time for STOP condition 4.0 µs tsu(BUF) Time the bus must be free before new transmission can start 4.7 µs t V Clock low to data out valid 900 ns th(CH) Data out hold time after clock low 0 ns fSCL Clock frequency 0 100 kHz tsu(STA) SCLK SDATA SCLK SDATA SCLK SDATA tw(H) tw(L) tf tr tr tf Start Condition SDA Input SDA Change Stop Condition th(STA) th(DAT) tsu(DAT) th(ch) Start Condition tv 12 3 7 89 MSB ACK Stop Condition tsu(STOP) 12 3 7 89 MSB ACK tsu(BUF) |
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