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LTC485CS8 データシート(PDF) 3 Page - Linear Technology |
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LTC485CS8 データシート(HTML) 3 Page - Linear Technology |
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3 / 14 page  LTC485 3 485fi elecTrical characTerisTics Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: All currents into device pins are positive; all currents out ot device pins are negative. All voltages are referenced to device ground unless otherwise specified. The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3) swiTching characTerisTics The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS ICC Supply Current No Load, Pins 2, 3, 4 = 0V or 5V Outputs Enabled Outputs Disabled l l 500 300 900 500 μA μA IOSD1 Driver Short-Circuit Current, VOUT = HIGH VO = – 7V l 35 100 250 mA IOSD2 Driver Short-Circuit Current, VOUT = LOW VO = 10V l 35 100 250 mA IOSR Receiver Short-Circuit Current 0V ≤ VO ≤ VCC l 7 85 mA tPLH Driver Input to Output RDIFF = 54Ω, CL1 = CL2 = 100pF, (Figures 3 and 5) l 10 30 50 ns tPHL Driver Input to Output l 10 30 50 ns tSKEW Driver Output to Output l 5 10 ns tr, tf Driver Rise or Fall Time l 3 15 25 ns tZH Driver Enable to Output High CL = 100pF (Figures 4 and 6) S2 Closed l 40 70 ns tZL Driver Enable to Output Low CL = 100pF (Figures 4 and 6) S1 Closed l 40 70 ns tLZ Driver Disable Time from Low CL = 15pF (Figures 4 and 6) S1 Closed l 40 70 ns tHZ Driver Disable Time from High CL = 15pF (Figures 4 and 6) S2 Closed l 40 70 ns tPLH Receiver Input to Output RDIFF = 54Ω, CL1 = CL2 = 100pF, (Figures 3 and 7) l 30 90 200 ns tPHL l 30 90 200 ns tSKD |tPLH – tPHL| Differential Receiver Skew l 13 ns tZL Receiver Enable to Output Low CRL = 15pF (Figures 2 and 8) S1 Closed l 20 50 ns tZH Receiver Enable to Output High CRL = 15pF (Figures 2 and 8) S2 Closed l 20 50 ns tLZ Receiver Disable from Low CRL = 15pF (Figures 2 and 8) S1 Closed l 20 50 ns tHZ Receiver Disable from High CRL = 15pF (Figures 2 and 8) S2 Closed l 20 50 ns SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VIH Input High Voltage DE, DI, RE l 2 V VIL Input Low Voltage DE, DI, RE l 0.8 V IIN1 Input Current DE, DI, RE l ±2 μA IIN2 Input Current (A, B) DE = 0, VCC = 0V or 5.25V VIN = 12V VIN = –7V l l ±1 –0.8 mA mA VTH Differential Input Threshold Voltage for Receiver –7V ≤ VCM ≤ 12V l –0.2 0.2 V ΔVTH Receiver Input Hysteresis VCM = 0V l 70 mV VOH Receiver Output High Voltage IO = –4mA, VID = 200mV l 3.5 V VOL Receiver Output Low Voltage IO = 4mA, VID = –200mV l 0.4 V IOZR Three-State (High Impedance) Output Current at Receiver VCC = Max, 0.4V ≤ VO ≤ 2.4V l ±1 μA RIN Receiver Input Resistance –7V ≤ VCM ≤ 12V l 12 kΩ Note 3: All typicals are given for VCC = 5V and TA = 25°C. Note 4: The LTC485 is guaranteed by design to be functional over a supply voltage range of 5V ±10%. Data sheet parameters are guaranteed over the tested supply voltage range of 5V ±5%. |
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