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LTC4449 Datasheet(PDF) 7 Page - Linear Technology |
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LTC4449 Datasheet(HTML) 7 Page - Linear Technology |
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7 / 108 page  LTC3882-1 7 Rev A For more information www.analog.com ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS Digital Inputs (SCL, SDA, RUNn, FAULTn, SYNC, SHARE_CLOCK) VIH Input High Voltage SCL, SDA, RUN0, RUN1, FAULT0, FAULT1 SYNC, SHARE_CLK l l 1.35 1.8 V V VIL Input Low Voltage SCL, SDA, RUN0, RUN1, FAULT0, FAULT1 SYNC, SHARE_CLK l l 0.8 0.6 V V VHYST Input Hysteresis SCL, SDA 80 mV CIN Input Capacitance SCL, SDA, RUN0, RUN1, FAULT0, FAULT1, SYNC, SHARE_CLK (Note 12) 10 pF tFILT Input Digital Filter Delay FAULT0, FAULT1 RUN0, RUN1 3 10 µs µs Digital Outputs (SCL, SDA, RUNn, FAULTn, SYNC, SHARE_CLOCK, ALERT, PWMn, PGOODn) VOL Output Low Voltage ISINK = 3mA; SDA, SCL, RUN0, RUN1, FAULT0, FAULT1, SYNC, SHARE_CLK, ALERT, ISINK = 2mA; PWMn, PGOODn l l 0.2 0.4 0.3 V V VOH PWMn Output High Voltage ISOURCE = 2mA l 2.7 V ILKG Output Leakage Current 0V ≤ PWM0, PWM1, PGOOD0, PGOOD1 ≤ VDD33 0V ≤ FAULT0, FAULT1, SYNC, SHARE_CLK ≤ 3.6V 0V ≤ RUN0, RUN1 ≤ 5.5V 0V ≤ SCL, SDA, ALERT ≤ 5.5V l –1 –5 –5 1 5 5 µA µA µA tRO PWMn Output Rise Time CLOAD = 30pF, 10% to 90% 5 ns tFO PWMn Output Fall Time CLOAD = 30pF, 90% to 10% 4 ns Serial Bus Timing fSMB Serial Bus Operating Frequency l 10 400 kHz tBUF Bus Free Time Between Stop and Start l 1.3 µs tHD,STA Hold Time After (Repeated) Start Condition. After This Period, the First Clock Is Generated l 0.6 µs tSU,STA Repeated Start Condition Setup Time l 0.6 µs tSU,STO Stop Condition Setup Time l 0.6 µs tHD,DAT Data Hold Time: Receiving Data Transmitting Data l l 0 0.3 0.9 ns µs tSU,DAT Input Data Setup Time l 100 ns tTIMEOUT Clock Low Timeout l 25 35 ms tLOW Serial Clock Low Period l 1.3 10000 µs tHIGH Serial Clock High Period l 0.6 µs The l denotes the specifications which apply over the specified operating junction temperature range, otherwise specifications are at TJ = 25°C (Note 2). VCC = 5V, VSENSE0+ = VSENSE1+ = 1.8V, VSENSE0– = VSENSE1– = IAVG_GND = GND = 0V, fSYNC = 500kHz (externally driven) unless otherwise specified. |
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