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LTC485I Datasheet(PDF) 2 Page - Linear Technology |
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LTC485I Datasheet(HTML) 2 Page - Linear Technology |
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2 / 12 page  2 LTC485 A G A U A R BSOLUTEXI TI S (Note 1) Supply Voltage ....................................................... 12V Control Input Voltages ................... – 0.5V to VCC + 0.5V Driver Input Voltage ....................... – 0.5V to VCC + 0.5V Driver Output Voltage ........................................... ±14V Receiver Input Voltage .......................................... ±14V Receiver Output Voltages .............. – 0.5V to VCC + 0.5V Operating Temperature Range LTC485I...................................... – 40 °C ≤ TA ≤ 85°C LTC485C.......................................... 0 °C ≤ TA ≤ 70°C LTC485M .................................. – 55 °C ≤ TA ≤ 125°C Lead Temperature (Soldering, 10 sec)................. 300 °C PACKAGE/ORDER I FOR ATIO ORDER PART NUMBER S8 PART MARKING LTC485CJ8 LTC485CN8 LTC485CS8 LTC485IN8 LTC485IS8 LTC485MJ8 485 485I 1 2 3 4 8 7 6 5 TOP VIEW VCC B A GND N8 PACKAGE 8-LEAD PLASTIC DIP J8 PACKAGE 8-LEAD CERAMIC DIP S8 PACKAGE 8-LEAD PLASTIC SOIC R D RO RE DE DI TJMAX = 155°C, θJA = 100°C/ W (J) TJMAX = 100°C, θJA = 130°C/ W (N) TJMAX = 100°C, θJA = 170°C/ W (S) SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VOD1 Differential Driver Output Voltage (Unloaded) IO = 0 q 5V VOD2 Differential Driver Output Voltage (with Load) R = 50 Ω (RS422) q 2V R = 27 Ω (RS485), Figure 1 q 1.5 5 V ∆VOD Change in Magnitude of Driver R = 27 Ω or R = 50Ω, Figure 1 q 0.2 V DifferentialOutput Voltage for Complementary States VOC Driver Common-Mode Output Voltage R = 27 Ω or R = 50Ω, Figure 1 q 3V ∆VOC Change in Magnitude of Driver R = 27 Ω or R = 50Ω, Figure 1 q 0.2 V Common-Mode Output Voltage for Complementary States VIH Input High Voltage DE, DI, RE q 2V VIL Input Low Voltage DE, DI, RE q 0.8 V IIN1 Input Current DE, DI, RE q ±2 µA IIN2 Input Current (A, B) DE = 0, VCC = 0V VIN = 12V q ±1mA or 5.25V VIN = – 7V q – 0.8 mA VTH Differential Input Threshold Voltage – 7V ≤ VCM ≤ 12V q – 0.2 0.2 V for Receiver ∆VTH Receiver Input Hysteresis VCM = 0V q 70 mV VOH Receiver Output High Voltage IO = – 4mA, VID = 200mV q 3.5 V VOL Receiver Outpu Low Voltage IO = 4mA, VID = – 200mV q 0.4 V IOZR Three-State (High Impedance) Output VCC = Max, 0.4V ≤ VO ≤ 2.4V q ±1 µA Current at Receiver RIN Receiver Input Resistance – 7V ≤ VCM ≤ 12V q 12 k Ω ICC Supply Current No Load, Pins 2, Outputs Enabled q 500 900 µA 3, 4 = 0V or 5V Outputs Disabled q 300 500 µA IOSD1 Driver Short-Circuit Current, VOUT = HIGH VO = – 7V q 35 100 250 mA IOSD2 Driver Short-Circuit Current, VOUT = LOW VO = 10V q 35 100 250 mA IOSR Receiver Short-Circuit Current 0V ≤ VO ≤ VCC q 785 mA VCC = 5V ±5%, unless otherwise noted. (Notes 2 and 3) ELECTRICAL C C HARA TERISTICS |
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