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BQ24745 Datasheet(PDF) 9 Page - Texas Instruments |
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BQ24745 Datasheet(HTML) 9 Page - Texas Instruments |
9 / 39 page bq24745 www.ti.com SLUS761D – DECEMBER 2007 – REVISED OCTOBER 2011 ELECTRICAL CHARACTERISTICS (continued) 7 V ≤ VDCIN ≤ 24 V, 0°C < TJ < 125°C, typical values are at TA = 25°C, with respect to AGND (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT IVDDSMB_Iq VDDSMB quiescent current VVDDSMB = SCL = SDA = 5.5 V, 0°C ≤ TJ ≤ 20 27 μA 85 °C ELECTRICAL CHARACTERISTICS 7 Vdc ≤ V(VCC) ≤ 24 Vdc, –20°C<TJ <125°C, ref = AGND (unless otherwise noted) (1) PARAMETER MIN TYP MAX UNIT [SMB TIMING SPECIFICATION (VDD = 2.7 V to 5.5 V) (see Figures 4 and 5)] SMBus TIMING CHARACTERISTICS tR SCLK/SDATA rise time 1 μs tF SCLK/SDATA fall time 300 ns tW(H) SCLK pulse duration high 4 50 μs tW(L) SCLK pulse duration 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 μs tSU(DAT) Data setup time 250 ns tH(DAT) Data hold time 300 ns tSU(STOP) Setup time for STOP condition 4 μs t(BUF) Bus free time between START and STOP condition 4.7 μs FS(CL) Clock frequency 10 100 kHz HOST COMMUNICATION FAILURE ttimeout SMBus bus release timeout 22 25 35 ms tWDI Watchdog timeout period 140 170 210 s OUTPUT BUFFER CHARACTERISTICS V(SDAL) Output LO voltage at SDA, I(SDA) = 3 mA 0.4 V (1) Devices participating in a transfer time out when any clock low exceeds the 2- ms minimum time-out period. Devices that have detected a time-out condition must reset the communication no later than the 35-ms maximum timeout period. Both a master and a slave must adhere to the maximum value specified, as it incorporates the cumulative stretch limit for both a master (10 ms) and a slave (25 ms). Copyright © 2007–2011, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s) :bq24745 |
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