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ST3485ECDR Arkusz danych(PDF) 4 Page - STMicroelectronics |
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ST3485ECDR Arkusz danych(HTML) 4 Page - STMicroelectronics |
4 / 16 page ST3485E 4/16 TRANSMITTER ELECTRICAL CHARACTERISTICS VCC =3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta =25°C) RECEIVER ELECTRICAL CHARACTERISTICS VCC =3V to 3.6V, TA = -40 to 85°C, unless otherwise specified. Typical values are referred to Ta =25°C) Symbol Parameter Test Conditions Min. Typ. Max. Unit VOD Differential Drive Output RL= 100Ω (RS-422) (Figure 1) 2 V RL=54Ω (RS-485) (Figure 1) 1.5 V RL=60Ω (RS-485) (Figure 2) 1.5 V ∆V OD Change in magnitude of Driver Differential Output Voltage for Complementary Output States (Note1) RL=54Ω or 100Ω (Figure 1) 0.2 V VOC Driver Common Mode Output Voltage RL=54Ω or 100Ω (Figure 1) 3 V ∆V OC Change in magnitude of Driver Common Mode Output Voltage (Note1) RL=54Ω or 100Ω (Figure 1) 0.2 V IOSD Driver Short Circuit Output Current ± 250 mA Symbol Parameter Test Conditions Min. Typ. Max. Unit VTH Receiver Differential Threshold Voltage VCM = -7V to 12V, DE = 0 -0.2 -0.015 V ∆V TH Receiver Input Hysteresis VCM =0V 30 V VOH Receiver Output High Voltage IOUT = -4mA, VID = 200mV, (Figures 8,9) 2 V VOL Receiver Output Low Voltage IOUT = 4mA, VID = -200mV, (Figure 3) 0.4 V IOZR 3-State (High Impedance) Output Current at Receiver VCC = 3.6V VO =0V toVCC ± 1 µA RRIN Receiver Input Resistance VCM = -7V to 12V 24 K Ω IOSR Receiver Short-Circuit Current VRO =0V toVCC 760 mA |
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