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LTC1334CSW 数据表(PDF) 3 Page - Linear Technology |
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LTC1334CSW 数据表(HTML) 3 Page - Linear Technology |
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3 / 16 page  3 LTC1334 AC ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RS485 Receiver (SEL1 = SEL2 = High) VTH Differential Input Threshold Voltage – 7V ≤ VCM ≤ 12V, LTC1334C q – 0.2 0.2 V –7V ≤ VCM ≤ 7V, LTC1334I q –0.3 0.3 V ∆VTH Input Hysteresis VCM = 0V 70 mV IIN Input Current (A, B) VIN = – 7V q – 0.8 mA VIN = 12V q 1.0 mA RIN Input Resistance – 7V ≤ VIN ≤ 12V q 12 24 k Ω RS232 Receiver (SEL1 = SEL2 = Low) VTH Receiver Input Threshold Voltage Input Low Threshold q 0.8 V Input High Threshold q 2.4 V ∆VTH Receiver Input Hysteresis 0.6 V RIN Receiver Input Resistance VIN = ±10V 3 5 7 k Ω Receiver Output VOH Receiver Output High Voltage IO = – 3mA, VIN = 0V, SEL1 = SEL2 = Low q 3.5 4.6 V VOL Receiver Output Low Voltage IO = 3mA, VIN = 3V, SEL1 = SEL2 = Low q 0.2 0.4 V IOSR Short-Circuit Current 0V ≤ VO ≤ VCC q 785 mA IOZR Three-State Output Current ON/OFF = Low q ±10 µA ROB Inactive “B” Output Pull-Up Resistance (Note 5) ON/OFF = High, SEL1 = SEL2 = High 50 k Ω Power Supply Generator VDD VDD Output Voltage No Load, ON/OFF = High 8.5 V IDD = – 10mA, ON/OFF = High 7.6 V VEE VEE Output Voltage No Load, ON/OFF = High – 7.7 V IEE = 10mA, ON/OFF = High – 6.9 V Power Supply ICC VCC Supply Current No Load, SEL1 = SEL2 = High q 825 mA No Load Shutdown, ON/OFF = 0V q 10 100 µA SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS RS232 Mode (SEL1 = SEL2 = Low) SR Slew Rate Figure 4, RL = 3k, CL = 15pF q 30 V/ µs Figure 4, RL = 3k, CL = 1000pF q 4V/ µs tT Transition Time Figure 4, RL = 3k, CL = 2500pF q 0.22 1.9 3.1 µs tPLH Driver Input to Output Figures 4, 9, RL = 3k, CL = 15pF q 0.6 4 µs tPHL Driver Input to Output Figures 4, 9, RL = 3k, CL = 15pF q 0.6 4 µs tPLH Receiver Input to Output Figures 5, 10 q 0.3 6 µs tPHL Receiver Input to Output Figures 5, 10 q 0.4 6 µs RS485 Mode (SEL1 = SEL2 = High) tPLH Driver Input to Output Figures 2, 6, RL = 54Ω, CL = 100pF q 20 40 70 ns tPHL Driver Input to Output Figures 2, 6, RL = 54Ω, CL = 100pF q 20 40 70 ns tSKEW Driver Output to Output Figures 2, 6, RL = 54Ω, CL = 100pF q 515 ns tr, tf Driver Rise and Fall Time Figures 2, 6, RL = 54Ω, CL = 100pF q 315 40 ns DC ELECTRICAL CHARACTERISTICS The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF (Notes 2, 3) The q denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, C1 = C2 = C3 = C4 = 0.1µF (Notes 2, 3) |
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