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XRP6840 Datasheet(PDF) 4 Page - Exar Corporation |
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XRP6840 Datasheet(HTML) 4 Page - Exar Corporation |
4 / 17 page X XR RP P6 68 84 40 0 4 4..3 3A A S Su up pe errcca ap pa acciitto orr F Flla as sh h L LE ED D D Drriiv ve err w wiitth h II22C C © 2009 Exar Corporation 4/17 Rev. 1.0.0 Default I2C slave 7-bit address for XRP6840 is 0101000b I2C TIMING CHARACTERISTICS VIN = 3.3V, TA = –40°C to 85°C, TJ = –40°C to 125°C. Unless otherwise noted. Parameter Symbol Min. Typ. Max. Units Conditions Serial Clock Frequency fSCL 400 KHz Bus Free Time between a STOP and a START tBUF 1.3 µs Hold Time, Repeated START Condition tHD_STA 0.6 µs STOP Condition Setup Time tSU,STO 0.6 ms Data Hold Time tHD,DAT(OUT) 225 900 ns Input Data Hold Time tHD,DAT(IN) 0 900 ns Data Setup Time tSU,DAT 100 ns SCL Clock Low Period tLOW 1.3 ms SCL Clock High Period tHIGH 0.6 ms Rise Time of Both SDA and SCL Signals, receiving tR 20 + 0.1Cb 300 ns Note 4,5 Fall Time of Both SDA and SCL Signals, Receiving tF 20 + 0.1Cb 300 ns Note 4,5 Fall Time of SDA Transmitting tF.TX 20 + 0.1Cb 250 ns Note 4,5,6 Pulse Width of Spike Suppressed tSP 0 50 ns Note 7 Capacitive Load for each Bus Line Cb 400 pF Note 4 I2C Startup Time after UVLO clears tSRT 1 µs Note 4 Note 1: All parameter tested at TA = 25°C. Specifications over temperature are guaranteed by design. Note 2: Current into all LED pins is up to 400mA continuously in Torch 1.5x mode. Note 3: LED current matching is calculated by this equation: 100% where IAVG is the average current of all channels. Note 4: Guaranteed by design. Note 5: Cb = total capacitance of one bus line in pF. tR and tF measured between 0.3 x VDD and 0.7 x VDD. Note 6: ISINK ≤6mA. Cb =total capacitance of one bus line in pF. tR and tF measured between 0.3 x VDD and 0.7 VDD. Note 7: Input filters on the SDA and SCL inputs suppress noise spikes less than 50ns. |
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